I designed a rat rack that would work well for small spaces/ people who want to interact/dont have much room.
It is 2' wide 2' deep and 4' or 6' tall. Using primarly wood, scratch/chew resistant whiteboard, and hardware cloth. The 6' tall version (mainly to conserve space) will have 6 levels about 8-10" tall, room for food to be placed on top of the racks for auto feeding, a hinged wood/HW cloth door with removeable dividers on aluminum rails.
That leaves the option of having 6 spots that are 2'x2' or dividing them up for mothers to have 1'x2' sections to themselves.
I am building myself a 4'wide and 6' tall version at the moment and will post pics when I do.
This is a great post, good job jo!