OK

Here's mine. My building board is a solid core door mounted on two under-sink kitchen cabinets (Home Depot about $39.00 each) with two Lind magnetic building boards plus extensions on the surface. The bench against the far wall is an 8' sink countertop (Home Depot about $55.00) mounted on two more under-sink cabinets. Room is 21' x 23' and was already built on when I bought the house. Previous owner used it to raise orchads.

Ceilings are 9'. Not all of the shop shows up in the picture (about 4 feet are missing).

Seems to work fine for me.

Dan