<human>: Can you summarize the given text in a few sentences?

My extended family is pretty small. It's just my brother, me, and two cousins. Lately inter-family relationships have been very strained do to infighting over my grandfathers inheritance. It's complicated, awful, and I won't get into it here. However - my one cousin is now getting married down in the Key West and has sent out his invitations. Family is pretty much expected to attend. 

The hotel fees alone will be over $1000 for the week not including the cost of planned trips such as snorkeling or sailing. My boyfriend and I are planning to attend college across state by next year. We both work but are barely keeping our heads above water as it (i.e I consider getting my hair cut a splurge and am in process of applying for food stamps). Already we're biting our nails trying to figure out how to pay for the move and tuition fees in the future. 

 In addition his side of the family(my uncle) is wealthy. I had a little hope that maybe they would extend a hand to help pay for the flight or hotel fees but it hasn't come to pass. Is it unreasonable to turn down the invitation because I just can't afford it? Would it be rude? I know the family would freak out at me for not going, but without help I just don't know how I could do it.
<bot>: Invited to wealthy cousin's destination wedding. Can't afford it. Rescinding the invitation will cause massive inter-family drama but I can't see a way around it.