Food

You're going to get a lot of pushback on doing your own food, honestly.

Partly because it is very stressful, difficult, and a whole extra load of work on top of the wedding planning, but mostly because of food safety. Many localities won't allow it, for one, and then there's the problem of keeping food at a safe temperature throughout the day, serving safely (particularly in COVID times), and cleaning up.

If you have sufficient help, it is possible.... but incredibly difficult.