At what size is an enclosed trailer too big/heavy for a V-8 half ton truck? I am thinking 6 or 7 ft wide X 14ft long. I am looking for a truck/ trailer combo right now. I got rid of an F250 b/c of horrible mpg for 150 miles or so every day. Looking at the Tundra but I don't think it would tow as good as a z71/F150/Ram would. I as big a trailer as I can get away with on a half ton. What do you experts think? I think its time to dump the 4cyl Tacoma/4x8 utility trailer and upgrade!