We have used four different mobile services, and I agree with Bob's notes. Depending on the problem, the location of the RV (RV being a trailer for Escapes, but a motorhome in our recent experience), and how it is being used, having a mobile service come to the RV can be a significant advantage. There are many mobile services, although finding them is not always easy. The ones I have seen tend to be one-person operations, so availability can be an issue (e.g. one and only tech goes on vacation, or is in another area fixing someone else's problem). Although they may have a minimum charge, they don't seem to charge for travel.