What do you think of this?

Sounds great! It'll be a lot of work but it's clear you're dedicated. I love horse rescue shelters- my TB mare is from a shelter, because she won 2 races, but then she turned 5 and got too old for racing. She's infertile, so her owners decided to sell her for meat. Lucky for her, a shelter bought her instead! I'll always be grateful to them for that!