Passion is important. So is making money
You have in life to go with your passion with one catch...........can you make a living at it?
I am a licensed condo manager here in Florida and have been in property management for 13 years. Trust me when I tell you that many days this is just a job, BUT it allows me to support myself and buy new (and old) car parts. I guess what I am saying is that there will be some " not so passionate" days of working on a car you are not so crazy about to put food on the table.
The real side of life is that you have to have a career that makes you money to survive. That being said, at least here in Florida quality upholstry experts are few and far between. I am not just talking "custom" work even daily driver stuff like headliners, etc. Seems to me that would be a good way to go at least in our state. Boat interiors,,,,,,,forget it,,,,,cant find a good company to work on my boat seats etc.
I like the idea of stopping by a shop and seeing for yourself what the job is all about. I can not imagine that a shop owner would not be proud to have a Marine come by his or her shop looking for your next profession. Thank you for your service to our country:D
Best of luck in whatever you choose:)