Starting to get business lined up before you start is smart! That way, you can hit the ground running....
People are always looking for some catering. I think it is a great idea, and you should go for it. How many people do you think could regularly support a business like this in your area? Once you get your first client, the rest should be easy.
Just a followup to the Health Department comment Some cities allow you to cook in your own kitchen but others require a commercial kitchen outside of your home if you are catering. Some businesses have commercial kitchen space that they are not using full time and you can rent on an as needed basis. Some health food stores with kitchens also rent them out on certain days or times. Check around and see if you can rent a part time kitchen while you are getting started. Doing that would let you avoid renting space full time until the business can support the rent and the purchase of all the commercial kitchen equipment.(second hand kitchen equipment stores are great places to look). If that is not an option maybe you could find a like minded person (who wanted to start a homemade salsa or jam and jellies business) and you could share the expense of the kitchen.Working from home as long as possible gives you a chance to spend money on other things like advertising.
Best wishes for your new venture