Raised Basement Subfloor/Platform?

Levi, I have seen a product at Home Depot just for this installation. They are 2' by 2' squares made up of 3/4" plywood on top of a plastic base. They inter-lock with one another, making a plywood floor over a concrete floor. Build the walls of this temporary bedroom to where you can use this product and not have to cut any of the squares. Maybe a 12' x 12' room, inside to inside of the bedroom. Hoped this helped in any way. Good Luck...

I'm uncertain what the goal is here. If it is to waterproof the surface my preference would be drainage layer products such as plakton, and dryfloor. They provide a resin/plastic drainage layer and give you the ability to put untreated plywood a inch above the concrete with no worry about water damage no matter how wet the basement is. This is the correct way to add a finished floor to a potential wet area. If your floor is perfectly dry, you could apply the plywood directly to the floor. It will be a mold disaster if the basement gets wet. You will have the same problem if you put untreated studs on the cement floor. Roson paper isn't a vapor barrier. It is used to provide breathability for wood. In other words is used by people who use air leakage as a safeguard, but don't want wind blowing through a crack. It is a traditional technique that usually results in a house falling apart faster. If you want a vapor barrier you should use either roofing felt or plastic. Rosin paper should reserved for a temporary cover to prevent damage during construction. Or where vapor barriers are not wanted. Again I don't know exactly what your situation is so I can't give you an answer suited to your situation.

You said temporary, so use two by two's or cut two by four's in half, place them on the concrete every 16 inches. If permanent, then bolt them to the concrete, they will move when you try to place the plywood down over them. Those 22 shell nailers work to attach them to the concrete. If you want insulation down place it between the two by's. Screw the plywood to the two by's, place carpet and pad over the plywood. If you don't attach the two by's to the concrete, the floor will bounce around when you walk over it. Wood will warp as it drys, and the concrete isn't perfectly flat either, so it will move!