You can probably look at around 20-30 USD for the set-up plus the price of the strings that you will buy. The amount of work that would need to be done should only take an experienced tech maybe 15-20 minutes. It's not an extensive amount of work... just a few minor things. So no worries. It's nothing that can't be reversed either... If the nut slot is cut properly by the tech it should still be able to seat a lower gauge string but still accomodate the larger gauges...