Been doing this sort of work since I was ~10 years old. Hand lettering grocery store ads for my family's weekly newspaper, A stint in the USAF, then a bewildering sequence of print shops, hand typesetting, offset camera work, running presses, and signs, always signs. In 1966 I went to work for IBM and like Navin Johnson, discovered my special purpose; writing code. I discovered that I could write code like Mozart wrote music and did so until I retired in 2002 ending up doing 31 years at HP. Still doing signs, Indy cars, top fuel dragsters, funny cars, etc.during all those years. When I retired I had a list of things I wanted to to. I got them done before noon the first day.
A friend, who had a booming business leasing and installing T posts and hanging real estate signs for all the realtors in the area, stopped by and asked if I still did signs. Seems that he got daily request from realtors for custom signs. I said yes. He asked if I still had any equipment. I told him I had a box of brushes.and a goodly collection of One Shot. He said he was thinking more of cut vinyl. Something I always wanted to give a try. So I invested some money, bought a plotter, Yet Another computer, and a butt load of this and that, and we set up in my shop. The next year we bought a printer and another plotter. We did a land office business.
I moved to Colorado's western slope in 2006, bringing all my tackle with me. Here I rounded up sufficient business to make it all worth while. I'm a bit long in the tooth now but I do just enough to pay for my weekly entry fees at various horse chasing cattle events and have a little walking around money..
I told my wife that should any of my gear die I was closing my doors. Lo, this year the printer I was currently wrangling died. I found I couldn't give it up. It's part of what I am, sitting around in the sun yelling at people to get off my lawn isn't acceptable. So I bought another printer, did enough to pay for it in a few weeks, and I'm still chugging along. Albeit I run a boutique business these days, seeking no new clients and turning down as much work as I accept. But the work finds me and I do just enough to still pay my entry fees.and associated expenses. Still have the same old computer running XP, a 10 year old Graphtec plotter, and a completely rebuilt Mutoh 1204 of unknown provenance. And I keep going, writing a little code here and there and signs, always signs. Most likely I'll keep on doing it until I either get tossed of a horse or wear away by erosion