"I'm not saying it's a bad idea...but I do think it could be complicated. "
You need to do a lot of research about this, even beyond the health requirements.
For four years I ran a consulting company specializing in questions of real estate development, location, and financial analysis..
When asked about a project, we always started with the question..."Who needs it?" You need to find out about this, first-hand. Most all the caterers in your area undoubtedly have their own kitchens already. So, who might your customers be?
What is your competition? Around here, there are several big churches that have near-commercial size kitchen facilities who would be happy to rent them out on a daily basis, and a local community center also does this. My Rotary club has used this kitchen and common-room spaces for years of annual buffet celebrations - Tex-Mex, or New England lobster boils.
Frankly, this sounds like a doubtful enterprise to me, unless you can actually identify a specific customer base. The "If you build it, they will come" proverb probably only works in the movies.