A few weekends back I bought a 1/2 sheet of 1/2" plywood to create an equipment shelf for beneath the layout and cut it to size - 26 1/2 x 17. I made it large enough to hold a TIU, AIU, PowerHouse 180 brick and TMCC command base - with some room to spare.
On Sunday I got the shelf installed and yesterday I got the TIU, AIU and PowerHouse set up:
I was running with an MTH Z-1000 - the PowerHouse upgrade should provide a bit more power. I also moved all the track wiring to a proper star wiring configuration, got three power drops in for a previously unpowered siding and phased all the power sources.
I have a bit more to do around wiring management, but definitely made good progress on getting the power reworked and the TIU off of a box on the floor.