I was in that exact same position a few years ago. Our biggest client offered to buy us out and hire me to run their internal shop. I had worked for the dealership years ago and knew a couple of people there who could attest to the commonality of "broken promises" on behalf of management so I knew that things were not likely to end well if I took the offer. That was just before the "great recession" hit and since that time, that dealership probably lost 80% of their business. While that had a terrible impact on our business as well, we survived by being as efficient as possible and adapting to customers needs. Fortunately, we have other customers that were in industries that were relatively unaffected or even thrived in the poor economy.
Business has been down over the past few years - no doubt but, this past winter brought steady work and was much better than anticipated. I am surprised at the number of customers that are spending money on new equipment so far this year. That has us considering a new printer and a few other small upgrades but, we also have a much better understanding for the need to better handle our own finances and plan for the next down period.
We specialized a few years back and I think we have a very good reputation for doing excellent work and rely on "word of mouth" to bring us new projects. If you have something to offer that competing shops don't, some people are willing to look beyond the lack of commercialism portrayed.
We have been running our sign shop for 21 years out of our home and I have no doubt that many potential customers pass us by because of it but, we also continue to maintain some accounts that other large shops can only dream of having. I think it really comes down to what you have to offer and how reliable your service is. Having said that, I do agree that there is a limit to how much revenue can be generated as a home-based sign business.
I have an office in the basement where I have my PC, vinyl cutter and printer and the shop is a separate 3-car garage where we prep the jobs. Some of our customers apply their own lettering and there are many cases where we go to the customers location to complete projects on-site. We also have access to a large building a few miles away where we can work on trucks when needed.
There have been times when I have entertained the idea of selling the business and moving onto something different but, it would have to be something where I can do it on my own terms. Maybe, one of these days I will work up enough courage to pursue another business venture but, there is a lot of research, preparation and learning to be done first.
Best of luck to you - what ever you decide.