Sonny....folks in some states really want to stay with a 2500 because of license costs and driving restrictions. Not sure about Alabama but in Texas I don't even know what the cost difference is. Apparently it's insignificant because it didn't enter in my deliberations of choices.
Anyway...you may find there is significant difference in Gross Vehicle Weight Ratings between brands. I bought the Montana when I had a Ford F350 Single Rear Wheel. By the time it was all loaded up, I was well over payload capacity. I looked at Chevy and Ram and discovered the Ford had the lowest payload, with Chevy next, and Ram the best. Example...My F350 diesel, 4x4, CC, LB, Lariat had 3264# payload, a Chevy equipped the same was 3750#, my Ram equipped the same is 4018# capacity. I think Ford builds the same truck with different GVWR so keep your eyes open for that if you prefer Fords. My Montana is 12,500# GVW. I usually pull it at around 12,000#, depending on water tank levels. This is as heavy as I want to go with a Single Rear Wheel. In fact I wish I had bought a dually because I have since bought the cabover.
Good luck........