u/FrostedButtHoles

I am likely a couple years away from attempting anything, but am an over planner. I’ve done work to finish my basement and build a few things around the house, but nothing like a trailer conversion.

The dumbest of dumb starting questions - what do you attach the wood framing to when building the interior shell? The existing metal studs? Nothing (on the sides), and just let the frame support itself between the ceiling joists and securing to the floor?