I keep 4 females per tub (usual black mixing tub) and rotate males through the rack.
Male gets 2 weeks in, then I wait for delivery, after delivery they get 3 to 4 weeks to grow out (depending on snake needs) and finally at 4 weeks the litter gets move to a holding rack and the 4 girls get 4 weeks off.
Cycle then starts all over again.
The rotation does get screwed up from time to time like this past couple months needing a bunch of pups for all the hatchlings.
With 5 racks and 6 tubs per rack, when everything is going right its great.