OK..... thought experiment

You are looking at buying a river camp.

Camp itself is pretty rough on side but structure is
sound

Instead of doing the usual remodeling inside....adding
more wire runs.... lights ...etc

What abt building internal 'skeleton" INSIDE the room
such that you could hang lights form it..... hang
suspended porch swings...... basically anything you'd
like

Can this be done?

If yes.... what could one use for the "skeleton" that
was strong enough to support weight but also easily
disassembled and moved in case of flood?