I have a feeling this question may have been asked before, It's a good question to think about and i too am having trouble with it. How Far from you house or wherever you run your business out of is too far. You could say i wouldn't't go any farther then 20 miles form my house, but say you have one house 20 miles away and then a person wants you to do their house too and they live only 2 more miles form the house that is already 20 miles away. Do you say no or yes, because you could be firm with your limit of how far you won't go, but what if it is close to a job you have? WHATS THE FARTHEST YOU HAVE EVER GONE JUST TO MOW A LAWN?