I just read over your whole plan, nice idea but I think it's a lot of money and space for something that can very easily be done with a few totes.

Once the snakes have locked up and done the deed, just move them back to the original enclosures, and rent the room to the next lucky couple.

After breeding, the totes can be cleaned out, and used for the babies.

And after that, stack em up till next season.

Or simply frame up a rack, slide the totes in, and boom instant breeding facility..

I'd just let the girls "spend the night" with the intended stud at his crib.