you need to know about keeping horses at home could fill a book the size of an encyclopedia
BUT, it sounds like you've got all the really necessary stuff down and I can't really add to what's been discussed here.
Enjoy having him at home. Personally, I couldn't imagine not
being able to walk right out and see them daily...or hourly if I wanted.
If you have anything else come up once you get him home, don't be afraid to ask here. We'll help where we can