Good info. I'd add that besides all the permits and stuff you already have to have, with a truck you also have registration fees, state inspection sticker, and insurance that are all required for a motor vehicle, at least here.
Great tips. I would offer one more. I would consider putting a lens cover over your fluorescent lights. Should one of them break or fall that glass and mercury vapor may put you out for a while.
PUT MONEY ASIDE AND ON DAYS YOU DONT HAVE GIGS, SETUP A LOCAL MECHANIC SHOP TO DO MAINTENANCE ON YOUR TRUCK OR TRAILER... LIKE PM SERVICE, FUEL FILTER,SERVICE BATTERY'S, FLUSH COOLANT SYSTEM, CHECK TIRE PRESSURE VERY IMPORTANT FOR WEAR PLUS FUEL ECOM, AND BRAKES... THAN KEEP INSIDE CLEAN AND UP TO DATE..