Why would anyone want to sleep on the top of a 90? Get a proper tent and an air bed.
Roof tents are incredibly versatile, and can be put up and taken down in minutes. We used to have an “air beam” tent, advertised as put up and pack up in less than 2 minutes I think. We put the roof tent up in less than 5 minutes the first time we used one. Throw sleeping bags in and it’s done. No messing around with air beds.