If mobile without comp and collision and covers damage to clients car,and insure equipment you're looking at 120 a month ,with comp looking at 300 a month thru progressive.If your moving a car 4 feet and damage something believe me it happens ,your insurance without customized detailing insurance ,your covered that's how I contracted my insurance so in essence I don't have insurance under mobile detailing,not gonna dish out 3 k a year dropped it 6 years ago.My equipment is valued at depreciation 1500 just be careful show any damage prior to detailing to customer and refrain from washing engines.