That's almost exactly the setup I've been using for last several years...only without bungies I'm using a aluminum (i think) shelving unit that is very easy to move. I think we are even using about the same size tubs. I like offering my rodents a bit of room. I run 3-4 african soft fur rats, the 4th generally being a male who is only kept in long enough to do his "job". Our lid setup is the same except for the foil tape, nice idea and probably prevents scratches from the edge of the wire.

I also made a sort of food/water hopper that hangs down from the lid. Its made of the same size mesh. They are less apt to chew on the bottle as its enclosed and it keeps their food off the floor of the tub where it could get soiled.