If this is your first go, then maybe start another career?
It's a consideration...the local go-to guy (artist, really) for canvas, sail, and trampoline work just retired (that's where I got some of my equipment). It's fun to do and I'm considering doing some of it as a business. The problem is that I'm already way too busy with a full time day job and the full time home graphics business...and the office that I built two years ago is nearly out of space again.