Weddings can be as cheap or as expensive as you want I discovered in putting my own together. Obviously if you want to go on cheap side you will have to accept some concessions, but at the end of the day all you need is to sign that paper at the courthouse (or mail it in) to make it official.
We got married for around 15k, but we have friends getting married in April who are probably going to get away spending around 2k, if that.
I know that sounds like a lot, but even my wedding was below average cost wise. A good half to two-thirds of that cost was just on consumables though (food, booze, and flowers). Even picking the cheapest option available, the catering is what really adds up.
My advice: rent a room, go cheap on the dress, BYOB, and order pizza, lol