I run 2 tandem wreckers, a 29 foot tandem carrier, a 2008 Kenworth T300 with 21 foot Jerrdan deck, a GMC topkick with a twinline Century deck, and a 1998 Kenworth W900L that pulls my 53 foot National travelling axle trailer or my Zacklift 5th wheeler or other trailers that i own. I  have been an owner operator my whole life starting 2 days after grauating from high school . Been in the towing business for over 20 years. before that ran a oilfield vacuum truck and hauled heavy equipment. Live in a small town with a population of 3500 people on the road to eastern slopes of the Rocky mountains. Makes for some interesting recoveries at times.. If I require more info I would ask that somebody would give me some guideline as to what to do .Thanks Jeff