Remember if it is a 6' wide and you tow behind a truck which is also 6' (roughly) the mileage will be a lot better and will take less hp. But whatever you do get one that is 6' 6" inside height measurement. I have had mine since 1997. 12' long, 6' wide, 6'6", single axle, with the wheels outside, and I live in it, plus load. You will hear a lot about single axle and double axle so I will not discuss which is better. In the years I have had mine, I had 1 blowout, make sure you change the tires every 6 years MAX, I go 5 years. The blow out happened on #94 between Port Huron and Detroit in morning rush hour. Looked back, saw people backing away, tire blew, took the fender with it, which is common, and I gently drove over to the side of the road, with no problems, balancing the trailer beening the key here. Change the tire, bought a new fender when I got back, $20.00 and away I went. My trailer will be parked at SS and will gladly take you through it. Oh I bought the barn doors for the back, easier to open, put in windows. I have a side door, 3 windows, BBQ, Fridge, bed, loading area, microwave, awing, carpet and a 70lb dog. You really have to think small, but it is fun. If you want to see pictures, email me. "NO" it is not for sale.