RE: PSE bow string replacement and shop checkup
It should not be that big of an ordeal. Most of the work done locally prior to the season is string replacement with a basic tuneup. Cost of a tuneup varies from $10 to $35 for the same service. String prices also vary but generally are between $4 and $12 considering the type of bow you are referring to.
You will, of course, have to retune it to some extent though if your measurements are adherred to then it should not be extensive.