How to, theoretically, earn a living with Larp.

This is entirely theoretical, as I have a day job. Most career advice is 'follow your passion'. What if you passion is constructing fake weapons out of plumbing supplies? What if your passion tends to have more to do with leather, chain, and plate rather than spreadsheets and office work? These days there is not much call for larp as a career choice. But there just may be some tangential career paths that could be relevant to larp.