When you go and price trailers you will find that the difference in price between 20' and 24' is very small. Most people buy 24' trailers so the volume of the build keeps the price down. My 32' LQ trailer has a 20' box and 12' living quarters. I have put my 69 D200 pickup in there with no problem, but it being taller it made the tie down easy, with a lower car not so much...