So we have three of these tractors that we use as needed. Right now the buck is separated from the 2 does, who are in a stationary enclosure because they have babies that are not yet weaned, and the stationary enclosure is built more securely, for predators. When the babies are weaned, they first go into a raised cage (shown), then into a tractor. And when the does dont have babies to nurse, we put them in a tractor. This is working for us, but i'm sure there are many different options. I think they are californians? Hope this helps. 
Discussion
Thanks for sharing. It’s nice to see how someone else does it. I do mine a little different. I built more robust tractors and let all the breeding and nursing going on in the tractor then I built grow out cages. Honestly, I haven’t had very many rabbits to eat personally. People have been buying them up before they get old enough to process.
Thats a good problem to have!
