I just found out some very good news: it's possible, according to state law, to have a commercial kitchen in one's basement. I could easily convert my laundry room into usage for this purpose! I had feared that one needed to have a separate entrance, but though this is preferred, it is not the law. The question now only concerns zoning, which is covered by the City of Grand Rapids.
I'm very excited by this prospect, and if this is possible, I'll definitely be starting up a little baking business in my basement, and start selling things at the Farmer's Market this summer, followed by chocolates in the fall.