So long story short: I was adopted as a baby, and I grew up as one of 11 children. Then, about 4 years ago I met my biological brother and sister. Over the course of the last 4 years I've come to meet what seems like 60+ more family members, aunts, uncles, cousins, you name it. Though I'm very very very close with my biological brother (we hit it off like two old friends almost immediately), and one of my aunts (I actually lived with her for a few months when I started a new job near her in SC), and I'm pretty close with my sister, the numbers add up quite quickly on my new side of the family.
We are getting married in a small barn that can only hold about 80 people, not to mention the fact that we're on the worlds tightest budge because we're paying for ourselves. Between my (adoptive) family, FH's family, and just a couple of my "new" family members (aunt,sister & nephew,and brother & fiance) it's added up to well over 100 people. Is it crazy and rude of me not to invite members of my biological family? I know that it seems weird, but I met them when I was an adult and really they're only a little more than acquaintances. I've never been invited to baby showers or weddings from that part of my family, but I think they are assuming they will be invited to mine.
Has anyone gone through anything like this? What's good etiquette for handling this situation?