I think consensus has been achieved on this forum - way over the top.
On the plus side, it makes me feel better about DD wedding in a couple of months! (we set up a joint checking account for them, deposited $15k and said do what you want with it (secretly hoping they'd elope and have that money for setting up household, longer honeymoon, etc). I haven't asked what their total is and wont. Future SIL parents will take care of rehearsal dinner, I don't know where, haven't asked, and am not concerned whether at the corner bar or a catered event - it's about the people, not the food/drink/venue.
For our 2 sons who where married 3 and 4 years ago, for first son, since we had a lot of out of towners and extended family, I smoked about 50 pounds of pulled pork and we "catered" it ourselves. That was great and relaxing.
For second son, we found a restaurant that had a private room and an "event menu" with 3-4 choices - smaller group but I think cost about $1300 or so. That too was nice and I didn't have to cook!
Then for each of the sons, we contributed $5k to their honeymoons (which one managed that as full cost).
I think back to the many weddings I've been to for others over the years and can't really say I remember one over the others, except those that appeared to spend a large amount - but I remember those as a waste of money vs a special event. Like others, I hope your DS is prepared for potential lifestyle expectation challenges that may come up when married (house, car, vacations, etc) because it doesn't come across that a LBYM attitude may be shared.