Re: can anyone make a living with this hobby?
For the longest time the only thing I couldn't do to a bicycle was spoke rims but I achieved that milestone when I laced up the 3 speed for my buggy bike.
Being a bicycle mechanic is really not that difficult to do at least in my eyes. The biggest things customers want is that when your handlebar shifter says 4th gear your bike is in 4th gear with no skipping and truing wheels.
That's actually a nice dream to own a bike shop with motorizing on the side.
You have found the fountain of youth. Ride and forever stay young.