I am in the same position. I currently have a 16ft and 2 12ft trailer. I just bought a 08 chevy 3500 dump truck, which is probobly the best investment I have ever made for my company. The first day I bought it I started 13 private gas stations, none of which have been serviced and none have dumpsters. I went to the dump twice, I only sent 1 guy while the others continued to work. Anyhow, since I have that dump truck for trash I am considering buying an enclosed, I just dont want to buy one bigger than 12 feet. Safety is my biggest concern. I am in Az where equipment theft is daily if your not carefull.