Drop Off Catering

If it makes you mad, why did you let her order it in the first place? I don't think it would be "tacky" to mix the cuisines, but I'm not sure it's entirely necessary either.

I'm having different kinds of food at my wedding since we're doing stations. Maybe you can set them up in different parts of the room like a food hall? Then it would be a bit fun as opposed to a bunch of different types of food. Each type of food could have their own decorations.

I don't think it's tacky, but why does she think everyone won't eat? Does she think there won't be enough? Or does she think there will be people who aren't interested in eating Mexican?

Asian and Mexican go together, there are quite a few new trendy restaurants in my area that are Asian-Mexican fusion. Trust me, I thought I died and went to heaven when I ate a kimchi burrito for the first time.

I don't think it's tacky at all. But are you going to have servers? Even if it's drop-off, someone has to replenish the food and make sure that people don't take too much or cross contaminate dishes.

Can you hire someone to help with serving? Clearing plates? I'm not sure I'd to Mexican and Asian, maybe Mexican & Italian, or Mexican & American?

I would actually advice getting more than one type of food. Some people don't like Mexican food. I know, I know, weird right. But I know some in my own life who don't like it. I agree with Umgani to have the different types set up at different tables/stations. That would be fun!

Well if you give the caterer the number of guests that have RSVP'd yes, they will know exactly how much food to make so there is enough for everyone tell mom in law not to worry! Trust them!

Do your guests know that some of them will be having "jobs" at your wedding? I can't tell if she's trying to save money or what, but what I find tacky is having regular people doing things that are better left to professionals.

Also, check with your venue about the bar. A lot of venues require you to hire a professional bartender, to avoid liability issues. They may not allow "Uncle Joe" to step behind the bar and start making drinks. There should be something about this in your venue contract.