[ansel12]

If I had one, I'd probably load it with amateur radio gear, a ham radio station on wheels. B-)

No kidding, you would be on your computer (today) and radio gear, sitting at that little fold out dinner table while able to open the fridge and grab a beer without getting up, and your bed would be just above your head and a foot behind you.

[fivecatsandadog]

And your bathroom would be under the kitchen sink (a bucket and a sponge).