I have done sites for 2 related businesses:
One does meal delivery services that you can order online. The ready-made meals come frozen and are easy to prepare - and really tasty.
The other does catering. (They did meal delivery but are phasing it out.)
I always thought it would be fun to be a personal chef, like to show up at someone`s house for a dinner party, make all the meals in a really nice kitchen, etc. But I thought out a few hurdles:
1) It`s time consuming. You can only be at one house for each meal!
2) What if the people don`t have good kitchen equipment ... do you bring all your own equipment, food, etc? I can see bringing in the food, but carting around my entire Calphalon set might be hard. I especially considered the homes that I would be doing such a thing in - they are often larger, in the hills, so you can`t just push a cart up there. It usually involves stairs. Maybe you could find a way to efficiently box things and use a dolly?
I thought about who I could partner with to spread my business - this is a strong word of mouth business. Good examples might be personal trainers and nutritionists. My angle would have been healthy, organic food prepared into delicious meals. I would have to do a lot of shopping at the local organic markets.
I also thought about what other services I could offer to make the business more profitable. One example would be to make ready-made meals for people on a diet ... like prepacked meals you deliver in the morning or once a week that are either refrigerated or frozen. You would have to figure out all the calories in each one for this to work, and possibly work with the client, a nutritionist and the personal trainer - all one team. You could spend a certain number a day a week focusing on this side of the business, say like Mon-Wed, and then do your personal dinner parties on Thur-Sun.
Another one would be fun, themed dinner parties ... like where I would provide all the food, decorations, dishes, everything. Like if they wanted to have a fun Hawaiian party where roast bbq pork was served on little straw plates, or clam bake night where you passed out those seafood bibs and baked the thing in a big pit in the yard (a makeshift pit is not hard to make on a patio with some bricks).
A big concern is location. This obviously won`t work in the middle of nowhere, Kansas. You would have to live close enough to network in an affluent area - people who could pay top dollar for your services.
Anyway, those are my ideas. Feel free to steal them - benefit from my daydreaming because I`m never going to get around to it!