My shop has been mobile for the 18 years I've been in business. I started with vinyl cutters & didn't get my Roland VP-300 until 2008. I'm currently in a 8.5'x24 trailer with a vending window.
My Honda EU2000 runs everything but the a/c. If I need to run my a/c, I use a 4000 watt generac. Most of the time I'm using a good power source wherever I'm doing the job at. I also make sure that my computers, cutter, VP-300 and anything else that could be sensitive is on large battery backups. I've never had a problem in 18 years.
During the summer months I work a fair & festival route. In the winter, I'm in the Tampa, FL area. Currently, I'm wrapping 4 food trailers in Pensacola, FL.
I decided to make my sign shop mobile because I enjoy traveling. That's been part of my biz model from day one. My customers love it that I can come to them & do the work on site. I've built a great reputation for doing quality work. I still have great customers that have been with me since my first year in business, so I must be doing something right.
If anyone has any questions on doing a mobile shop, please ask. I'll be happy to help if I can.
I'll post pictures of my mobile shop soon.