Haven't seen this one before.
Also - I'm pretty sure these are normally called "tent cots". And they're usually about $150-300. Putting one on a hitch should be a pretty easy task. Or just putting them on the roof when you're going somewhere is easy enough. There's a billion different sizes and designs of tent cots.
At least this guy is kinda interesting..
I saw a RTT recently that they had made a flexible fabric fold up floor system and they used flexible poles to hold the top up. And the entire thing could then fit in a bag about the size of a sleeping bag and store inside the car.