Are you still out there? I think your basic plan is good. Since you have a space limit caged rabbits is good way to go. I would try to have 2 bucks since nothing stops a breeding program faster than having the solo buck drop dead for no reason at all. The 20 x 36 cages would work better with smaller rabbits like Florida Whites, but I would use Dutch in those smaller cages. They are half the size (5 lbs) of the "commercial breeds" (10-11 lbs)
which means half the feed bill. But as a breed the Dutch will raise 10-12 kits per litter, have good mothering instincts, are usually easy breeders. The two-toned fur color pattern is very popular for pets. But the real treasure is the short, cobby little bodies are like little meat bricks. They will dress out at 60% carcass after head, feet, fur, and internals removed. This means a 10 week old at 2.5 lbs will give up to 1.5 lbs of carcass (meat/bones). Commercial producers would LOVE to have consistent 60% dressout without large bones.
Have a good day!