That's quite the set up! It sure does seem there would be a whole lot less wasted food doing things that way and that feed basket is an ingenius creation as well.
I see that you've also eliminated the need for the cages to have individual water bottles (which really look like a pain in cases where many cages are used) by using some sort of gear that I can't figure out. Are those hoses pressurized or more passive? I'm usually anti-gadget but I know a good idea when I see one, what's going on there? Whatever it is I'm sure it's a lot less work than running to the tap over and over.
It really looks like your one step away from having a self sufficient rodent colony, that one step of course being a way to make the tubs clean themselves out. lol!
I feel a little light headed... maybe you should drive...