One thing you need to be extremely cautious of when putting ANY air mattress in an RV---
Long ago I had an air mattress in an older TC I had. I HATED having an air mattress.
Why?
* You have to remember to air it down completely if you're going over any mountain passes. If you don't it will pop.
* You need to carry a spare air mattress in case it gets a leak you can't find...or... pops because you forgot to air it down going over a mountain pass.
* You have to let air in/out to adjust firmness every time you go somewhere because you're camping at different elevations.
And lastly...
* I had a Sleep Number bed once (in my house) - I'll never own another one. It got a leak and Sleep Number's customer service was horrible. It never got replaced even after repeated calls, thier warranty was basically worthless.