OP, my brother-in-law has been a professional firefighter for 15+ years. He has never, ever made that his only job. He has had a side business every step of the way since they have so much time off. First it was a moving company, then an antique shop, then he discovered a talent for and love of photography and parlayed that into a successful wedding photography business, one that he was able to sell to an investor. And he still has lots of time for his family, vacations, etc. Your husband needs to try harder.