If you're thinking paying them $15/hr or something, then it isn't going to happen. Specifically to a dollar amount hard to tell. But for 2 coils or 1, at least a few bills. No matter what part of the country. You have to figure them spending at least half a day, depending on how and where they are located. 1 or 2 guys and the owner has to make some money, pay for the $4 gas to get there, plus miscellaneous materials, put insurance on his truck and his company, as well as health insurance for employees, retirement, etc... Uncle Sam also likes to make a little money as well as any state or sales taxes applicable to your area. Couple that with the rising cost of refrigerant and hopefully you get the idea.