Our daughter is getting engaged & is looking for us to foot the bill. $$$$$$

[Aussie105]

29. I'd be inclined to feign disinterest. Or poverty.

If money needs to be involved, get them to prove the relationship is legit.
Offer them $10K to be paid 5 years down the track!
(Yes, I'm nasty like that.)

Marriage is the easy bit.
Done it twice myself. Registry office, one witness, minimal costs, no party.
Making it work long term, well, that is hard.
You don't get an award at the start of a marathon, after all. At the end, maybe, if you are good enough.

Seriously, if you have doubts, you really feel it isn't good use of your money. $20K? Jeez!