I still have the frame of our four man tent. Somewhere the rest of it got misplaced in the move. It was only a couple hundred dollars in 1975.
Probably 350.00 or more now. We put a ground cloth down and a half inch foam pad we bought somewhere, a little larger than the tent( mice liked to chew on the foam, all around the tent)with a rain fly on back and another larger fly for the front. On top of the frame a tarp with bungies to the ground. Formed an air space and the tent did not get too hot and stayed dry. Sent many nights, while hunting, with wife and first child. I'm trying to remember the name as I've been typing this but... It was oiled, meaning waxed cotton type material. It was and still may be the leading brand. You could actually sleep maybe 6 in it. The three of us had lots of room. If I had someone to set it up I might use it now. A guest would be well accomodated with that foam pad. I read a while back about a small air conditioner designed for them.