You will have to get a DOT number. As long as truck gvwr and trailer gvwr is under 26k you are ok without a cdl. But I think that truck is going to put you over the limit and you may need a cdl. If truck gvwr added to trailer gvwr is over 26 k you will need a class a cdl. I would think long and hard about getting a f550. It is one geat built truck but the powerjoke(I call it that because they gave me hell) is a joke. It is good until you hae a problem then its one after another. Our local ambulance quit buying them...stayed in garage too much. Plus all NEW diesels ger horriable milage. I would look at a new sterling or dodge 4500 or 5500. My old 12v cummins in my 98 has over 300K and has never been touched. I am looking for a f405 or 550 with blown engine....I want to put a 03 to 06 or 12v cummins in it. Now that would be a truck!