I lived in a town, long time ago, where one of the bicycle shops offered space for clients to tinker on their own bicycles using the materials of the shop. They were not expensive, you got access to all the tools for free. And if you got stuck, they would help out for a very reasonable fee. Lots of the parts you could need they had in a second hand version in store too.
It just was fun to go there and work on a bicycle. They would still be able to make enough money to live from. And, it was the best advertising a shop could get. If I remember well some talented tinkerers found a job there too.
Ahhh, that town, only place in my life that ever managed to get me 'homesick'.