We live in an old brick house, which is rented. It makes wifi a little unstable upstairs, and presents some seemingly serious problems regarding wiring as all the internal walls are pretty solid. I imagine they must have a cavity (else where do the electrics run?) but they're easily a foot thick overall and so not something DIY novice me could just run at with a drill without causing some kind of mess/chaos. 
Currently we have VM 200/20 entering the front of the property under the window, directly into the living room. It terminates about two feet away from the entry point, atop a small corner box cupboard which contains a RCD/electrics. So far I have the SuperHub 3 stood on top of the cupboard in modem mode, with a small patch cable running to an APU2C4 running pfSense, which itself lies next to the SH3. The pfSense box has a small TP-Link 8 port POE switch sitting on top of it. So far the only wired device running from the switch is a Ubiquiti UAP AC PRO.
It's quite a neat and compact setup overall, considering, though the location is a bit awkward for running RJ45 wiring to other parts of the house. I've been debating it for a few days, as I really want to run ethernet to the desktop PC (same living room, but on the opposite wall) and also run a cable to our bedroom which is upstairs, above the opposite half-end of the living room to the SH3/cable install. A picture paints a thousand words, as they say:
My plan, as per the pic above, is to wall mount the AP above the picture rail over the SH3/firewall/switch. The only wireless devices in our house will be phones and iPads, which tend to be in the living room or bedrooms. This location would be fine for wifi (it's where it stands now, just not wall mounted). I would then run some cat6 cable from the switch along the skirting, going opposite ways away from the network equipment.
Run 1 would go along the top of the skirting under the window, then hugging the frame around and over the door, and then come away from the skirting to directly enter the desktop PC. Run 2 would run in the opposite direction; but this time along the top of the upper picture rail, and then run up the corner of the wall concealed in slimline plastic pipe/cable covering to the ceiling. The plan is to drill a small hole up through the ceiling, and then hook the cable through the floorboards to a wall mounted ethernet faceplate or keystone jack (?) just above the skirting in my room by my bed where I keep my MacBook Pro.
The plan is this would be minimally intrusive visually speaking, relatively easy to do (only one hole to drill, through an artexed ceiling), and means the main areas of the house both have wired access to the network.
Does this sound about the best way to achieve what I want? The only alternatives I can really think of are running directly out of the house and up the external wall, then back in to the bedroom to a faceplate, or else some weird and wonderful way of running up to the loft and then back down into the upstairs rooms (likely unfeasible and more mess to achieve basically the same thing). I don't want to mess with power line adapters and would rather just have proper wiring in place as we plan to stay here for the foreseeable future (it's an assured tenancy).
Any thoughts/caveats/tips please chaps, before I bust out the DIY? Is there a suitable faceplate that allows the RJ45 cable to enter from the bottom/side rather than through the back (as it would when the cable exits a cavity wall)? I'm quite happy to cut cable to length and punch down and/or fit fixings to the end, and have the tools. I'm just not sure on the drilling/locating aspects. N00b.

Currently we have VM 200/20 entering the front of the property under the window, directly into the living room. It terminates about two feet away from the entry point, atop a small corner box cupboard which contains a RCD/electrics. So far I have the SuperHub 3 stood on top of the cupboard in modem mode, with a small patch cable running to an APU2C4 running pfSense, which itself lies next to the SH3. The pfSense box has a small TP-Link 8 port POE switch sitting on top of it. So far the only wired device running from the switch is a Ubiquiti UAP AC PRO.
It's quite a neat and compact setup overall, considering, though the location is a bit awkward for running RJ45 wiring to other parts of the house. I've been debating it for a few days, as I really want to run ethernet to the desktop PC (same living room, but on the opposite wall) and also run a cable to our bedroom which is upstairs, above the opposite half-end of the living room to the SH3/cable install. A picture paints a thousand words, as they say:

My plan, as per the pic above, is to wall mount the AP above the picture rail over the SH3/firewall/switch. The only wireless devices in our house will be phones and iPads, which tend to be in the living room or bedrooms. This location would be fine for wifi (it's where it stands now, just not wall mounted). I would then run some cat6 cable from the switch along the skirting, going opposite ways away from the network equipment.
Run 1 would go along the top of the skirting under the window, then hugging the frame around and over the door, and then come away from the skirting to directly enter the desktop PC. Run 2 would run in the opposite direction; but this time along the top of the upper picture rail, and then run up the corner of the wall concealed in slimline plastic pipe/cable covering to the ceiling. The plan is to drill a small hole up through the ceiling, and then hook the cable through the floorboards to a wall mounted ethernet faceplate or keystone jack (?) just above the skirting in my room by my bed where I keep my MacBook Pro.
The plan is this would be minimally intrusive visually speaking, relatively easy to do (only one hole to drill, through an artexed ceiling), and means the main areas of the house both have wired access to the network.
Does this sound about the best way to achieve what I want? The only alternatives I can really think of are running directly out of the house and up the external wall, then back in to the bedroom to a faceplate, or else some weird and wonderful way of running up to the loft and then back down into the upstairs rooms (likely unfeasible and more mess to achieve basically the same thing). I don't want to mess with power line adapters and would rather just have proper wiring in place as we plan to stay here for the foreseeable future (it's an assured tenancy).
Any thoughts/caveats/tips please chaps, before I bust out the DIY? Is there a suitable faceplate that allows the RJ45 cable to enter from the bottom/side rather than through the back (as it would when the cable exits a cavity wall)? I'm quite happy to cut cable to length and punch down and/or fit fixings to the end, and have the tools. I'm just not sure on the drilling/locating aspects. N00b.
