Nice work Vince, you'll have to let us know how they go in terms of performance. As for the racks and racks of desktop, that's a hell of a homelab for you now haha.
It's interesting but there are some things I have done to make life easy, every desktop will try and turn itself on if it is off between 3am and 6am, it will also automatically come on with a random delay to booting so the whole estate doesn't try to draw all the power at once. If a users desktop is an issue I have roaming profiles and a number of VM/s and also spare machines we can quickly migrate them onto. wake on lan is enabled and so is wake on power loss so no issues there. We have 24/7 remote hands at the dc and I know the guys there so am happy for them to dig around my kit if need be. Performance wise so far we seem to be cracking along nicely, the internet connection sits on a 15gb backbone so is blisteringly quick. I have RDS and also multi factor auth ssl vpn for remote users, but I also have outlook anywhere configured on my exchange 2016 servers and also have set up inbound routes for all other services such as crm, cms, intranet etc directly. In essence we are better positioned then ever to take the inbound traffic. So far I have to say that I have been more than happy with how the estate is performing. Replication from one estate to the other for example has seen fairly big increases and compression on the inbound on the vpn seems to be coping better. It's early days but I think this move is super smart for the business. When you consider everything it makes absolute sense.