I am an outdoor adventure guide by profession. My guiding season is from Spring until Fall, as I am a paddling guide and instructor mostly. I need to figure out how to keep myself sane in the off season, while also making a bit of cash so I am not completely reliant on my partner during these months. I was wondering if anybody could tell me what they find is the easiest DIY type work to get into, and to turn into a "side hustle".

Quick notes about me: I am fairly manual, so do a lot of my own work on my car (brake maintenance, oil changes, etc), grew up doing some wood working with my dad, but also know a lot about quilting, cross stitch, embroidering, etc. via my grandma. I have always been intrigued by leather crafting, but have never done anything related to it.

Any advice / ideas about what type of DIY work I can start working on and honing to keep myself sane and make a bit of money? Something that doesn't cost a fortune to get into?