While not a breeder...
If you feel you must for your stated reasons keep your females together...
I would if you can...once you have bred them, put the females in seperate tubs.
it might be cleaner in the long run, it is easier to tell which male/female is on which eggs for genetics... (if you get one that is sterile or low fertility rates, low egg count, you know which snake it is).
And well, here is one to think about, I know you must have seen pics of one snake eating another, and you are sure it won't happen to you... but.. what if you have the male in with the two females, and one eats the other? Or feels threatened and attacks?
Also.. what if one is having problems passing urates or is egg bound, but you can't tell cause you have multiple snakes in each tub...
Just a thought, your decision, and perhaps getting tubs and UTH's and placing them on top of the racks would be a good solution until you move...
Hope it is all good in the long run, and that breeding is great and successful for the snakes.

Carol