Hi Everyone,
I'm just going to echo what most people said. Initially we had the same concern about making people go and spend a ton of money for our wedding. However, our other option is the typical wedding with 200 of our closest acquaintances. We started casually polling our closest friends and family and are putting a reasonable cost of stay as a top priority. Of course you have to expect that even people who are close to you might not be able to make it but ultimately, people are going on vacation so chances are, once they are there, they'll love it.