All the lil box trucks I've seen are diesel,and thats $4.40 here. And a tank that you could put a small lake in. And I priced used NPR's a dirt cheap one is running 15k. You can get a super good used pick-up and 16-18ft trailer for a 1/2 the cost. I see nice used trucks in the 5k range and a trailer for $ 2,500 max!