I have joists in the basement, 8' ceilings. So I was going to put 1x3 pressure treated down, shim them up, and cover with OSB for the subfloor (this is on top of concrete, no water problems). Then carpet over that, sound good?
I do have a drain for a toilet, and thought it'd be a good idea to stick one down there while I'm at it. The water softener is right by that drain, so would you recommend framing that into the bathroom to get it out of sight?
The landing for the basement is only open to the left. It's framed in with a door, and it's impossible to move anything larger than 4x4 through that door. Terrible design. I was going to rip that door out and open up the wall a bit going down to move larger objects down there (like a pool table, drywall, etc). Any problem in doing so?
Drop ceiling... While I'd rather have drywall ceilings, drop will make it so much easier for running pipes, wires, etc, in the future. Do you frame around main air duct that splits the room or drop the ceiling another 6" to cover the whole thing?