Greetings! I do hope you'll incorporate your wide range of interests into your van life. Creative problem solving is one of the best parts, IMO!
I am also a seamstress, with heavy emphasis on pattern drafting, garment construction and costume "building". Mending is always in demand (as you probably know!), but many would-be customers have little appreciation for what it can take to resurrect a damaged piece of clothing. My daughter was a Renn Faire performer for years, and since I spent a lot of time in back lots, I considered hanging out my shingle: "Get Your Fix Here," but the young'un vetoed the drug reference.
Again, welcome!