Buy at least 3/4 ton truck diesel. You will regret having a truck without enough power and capacity to tow safely and comfortably. The difference between driving around town in a 1/2 vs a 3/4 ton is minimal and IMHO is not worth the trade. I have owned a 1/2, 3/4 and now 1 ton Dodge and the difference is minimal but when towing with my 1 ton, it is safe and comfortable. Towing weight is only 1 part , the ability to keep the trailer stable in winds and passing 18 wheelers and really important is stopping the trailer and truck.