Unless you bought a cheap one just for rental purposes...I wouldn't do it if you have any care for the unit.
That said:
- What is wrong that it is difficult to drive? No you can't treat it like a sports car but shouldn't be anything too difficult.
- I think the market would be far better for a small to medium size trailer. Other than the stray person who simply wants to see what staying in a truck camper is like, most will be happier spending the weekend in a travel trailer. I think the market is too small to make it a viable business.