thats why you have people bring you their rigs, work on it and charge out their ass for the work
Or, and this may be a hard thing for some to wrap their heads around, you do the work on people's rigs and undercut everybody else! Greed is fucked and will bight you in the ass, but if you offer a good, reputable service at a low price you'll have constant work and will gain more respect.
Or you could just be greedy and think in the short term