My winter project is building a trailer mounted bbq pit. The pit is just about done and the trailer I was going to use was not big enough. I am going to build a trailer and am ordering a 3500 lbs axle with brakes. The trailer is going to be about 12 ft long and probably never have more than 2000 lbs on it when loaded. We are debating two different types of steel to build it with, the first is 2x2 square tubing 1/4 wall thick. the other is 3 inch I-channel. We are split on what to use. does anyone have any advice?