Including church/prep costs our wedding and reception for just over 100 people was about $8000 or a little under. (I think, my memory is a little fuzzy, since I despised wedding planning).

This is including the things that people generously paid for us and things we paid for ourselves. My parents had said they would pay for the church and dh’s parents said they would pay for the booze (ah priorities

). But when it actually came down to it, I think my parents actually paid for the church, my dress and veil and dh’s parents gave us a large sum for the reception and the homemade invites. But initially we had been responsible for paying for everything.
-We did this by having a buffet style dinner, the free center pieces that the hall provided, no coverings on the chairs, no extra decorations in the hall, among other things. This freed up money to offer a keg of beer for our guests free of charge (which my FiL offered to pay for, because it was very important for that side of the family

).
-We got a photographer from craigslist, who instead of keeping the rights to our photos gave us the electronic copies of our photos so we could get prints where ever we wanted.
-We limited the time of the DJ to when people would actually dance.
-I made all the bridesmaids bouquets and other flower things. (I did get a real bouquet for myself, but if you are only getting one, it is pretty affordable.

)
-My dress was rather expensive, though an “off the rack” about $700. I bought a veil but used my SiL’s underskirt, and I used an old pair of shoes that I already owned. (I also didn’t need much alterations, just the bustle, because I got a lace up dress, and used “high” heels in order to avoid the hemming).
-We (well my Mil) bought blank invites and printed them off ourselves so that the postage was more expensive than the invites.
-we got a small(ish) cake, with a sheet cake to actually feed the guests. $300 total, but it was yummy, with a strawberry filling.
-The music for my wedding was kind of expensive. $150 for the coordinator/pianist and 2 other musicians for $75 each. My SiL sang for free.
-$100 gift/donation for the priest
-The Church and prep was also expensive. I think all together it was $800, but I would have to ask my mom for sure (600 for the church for members), this was one expense they decided to help us with.
A lot of expense though is dependent on where you live. I got married in the midwest, but near a major metropolitan area. I am sure it was a lot cheaper than if I had done the same things in NYC or LA. If you get married in the rural areas it is even cheaper.
Other expenses are cultural or family expectations.

This isn’t bad per se. I have a large extended family and it is “custom” in our family to invite and entertain, with food and music, all the aunts, uncles, cousin’s and cousin’s kids if they choose to come. Because of that, we only invite a small sampling of our friends to keep costs down and to keep the awkward factor down. (all my friends sat at 1 table seating 8). Weddings in my family (mom’s side) are de facto family reunions.