Wife bought me a basic quad drone 2 Christmas's ago, 2 batteries each lasting 7 mins and takes hours to charge. Runs via remote or you can control it via wifi and your phone screen using the onboard camera.
In all honesty, I've not touched it in 12 months because it would never fly as you would expect. A simple hover and it would shoot over to one side, almost as though something wasn't right but it cost £40 to not really surprised.
I've a couple of hundred pounds and looking at getting a basic but decent setup, ideally FPV as i'll find that easier to fly. Also looking at the Eachine EV100 for £76, gets some good reviews.
Am I better buying an off the shelf drone + FPV head unit or is it wiser to buy components and build yourself?
Regarding FPV, I take it the footage is done via frequency in a similar manner as controllers, meaning you can run several units at once? Is it also possible to run 1 drone onto 2 FPV headunits? It'd be nice if I was any good for the kids to be able to watch as well and experience it?
For starting out, just buy ready to fly. You can make it your self if you like that part of the hobby and it helps putting it back together if you crash (you will), but you don't need to. I have one I built myself and two off the shelf.
For goggles, unless you buy a quad with some weird propitiatory video link, the quads vtx (video transmitter) all send out a signal on 5.8 ghz. So you can have as many receivers as you like looking in. I have my goggles and a simple receiver that plugs into my phone if others want to watch.
You can change the specific frequency on the vtx to one of around 40 different channels and match the goggle up and away you go. Hence you can have more than one quad flying around at a time.
As to if you should learn LOS first? I wouldn't bother, other than to be able to hover in front of you to see if your quad is OK.
I can't think of any time where I've been flying and lost video signal that I've thought, on the way to find/pick up my quad, I could have taken my hand off the controller, lifted up my goggles, put my hand back on the transmitter, found the quad with my normal eye sight, worked out it's orientation and regained control before it hit the ground/tree/bush.
Just to add, you might want to up your budget a little. You will need a transmitter to control your quad as well ad batteries, charger, spare props and that in a bundle might be pushing your budget a little.
something like the wizard x220 rtf bundle from unmannedtechshop for £183.
Simon