If one wants to keep one's rabbit production up and vet bills low to maximise profits ... one's best bet is to house individual does in their individual hanging all wire cages hung from the ceiling in a barn with plenty of ventilation as well as very good lighting .Place the doe into the buck's cage when she is ready to be bred, after 2- 3 successful breedings in a very short time ( from a few minutes to an hour ) return her to her own all wire cage.
Hanging wire cages is the most sanitary and less maintenance. Put tubs under them for easy delivery of manure to your garden. Rabbits are very territorial and don't do all that well in colonies. Its hard to know when rabbits have been bred and when they need nesting boxes or material.