The Lamzac was designed for exactly this purpose. Quick to set up and space-saving to supply. You will probably even have to refill the air daily. When I'm lying on it, I have to tighten it a bit every 1-2 hours (wind it up a bit more when I close it) so that I don't suddenly lie on the floor :-)
Inflating is very quick, it's best to watch a short manufacturer video before the first time.

Problem-free. With a little practice, it goes very quickly.