I think young people watch too much TV these days and all think they must spend a fortune and have all this fancy stuff to have a nice wedding. My feeling is that what you really need to share with your guests is a celebration of love. Thank goodness my daughter thinks a small gathering of truely close friends and family in any setting with as little as cake and coffee is enough. This single mom can feed the masses...but not catered, not in a fancy hall, so we'll see what happens when (if) that time comes.!!! I will say, at my own wedding many many moons ago, we cut our guest list in half by excluding kids under 15. We had drinking and dancing and I did not want to deal with crabby kids hanging on me (I have many relatives and we're close). I still don't regret it, and only one person was ticked they had to get a sitter. They got over it!!
Best of luck. Remember to count to 10!!