Coffee brewing! It's not super niche (a lot of people enjoy coffee), but I'd love to get to the point where I could host free coffee for friends and be able to make just about anything one could ask for and make it well. It'd be nice to share it back just out of the love of doing it.
Right now I’ve mastered the pour over and the cold brew, but I’ve been recently figuring out how to dive into the espresso machines. That’s been the main set back to opening up the free friends coffee shop out of my apartment lol, don’t know the right one to get and all of that.