[SnaggyJoker]

Something you will find is that sometimes you can become friends with the owners of the speciality shops and borrow their tools. I have run into this in the automotive repair field. Specifically when I was repairing foreign vehicles. Of course some times the shop will charge you for the favor and usually it is better to just recommend them for the service if they have the availability. This can also help bolster your friendship with them.

As far as monetizing something like wheel building, of course the more experience you have the faster you will be at it. In the end it is all about what the customers want, and they might value having you do it over the more experienced person for different (and possibly illogical) reasons than you might think. It might even boil down to simple availability or your location being more convenient.

Make sure you have proper insurance!