What is considered reasonable rental fees for renting a kitchen (whether in a restaurant, catering hall, or other) for working on wedding cakes?
Can you do the cake decoration at home or is that against code as well?
Chera, in most states/counties, you can't produce any perishable foods from home. In most cases, you can't produce ANY foods from your home kitchen for sale. Check with your health department on that, but I highly recommend you get a commissary kitchen that already has been licensed by the health department. Because of demand, you may have to make a lot of calls. I discovered that many restaurants are willing to rent space out on their off hours. In my case, I'm working in a restaurant kitchen that does dinner only, so I go in when only their pastry chef is there and I'm out before any of the staff arrives. I got lucky because the owner is a friend of mine I've worked for in the past and I get along well with his PC.
Fees will vary depending on the establishment. It could be $20/hr, it could be $80/day, but most places have a minimum with only specific days available. I found the rates are all over the place, but $20/hr seemed to be pretty prevalent. Just be sure that when you start asking questions, make sure they have the equipment you need. One place that offered me a space had no mixers (she produced wholesale ice cream), and only induction burners. But she did have sheet pans and a speed rack. But the only day I could work was Mondays. Some of the products I make require a 20-qt mixer. That was the deal breaker.