AIBU to decline a midweek cousin's wedding abroad?

[Puppypleaser]

I’ve been invited to a cousins wedding. It’s midweek in and abroad so involves 3 days off work , away from the family and probably about 1k in cost.

I haven’t seen the cousin in question for about 20 years and although I would have seen my uncle quite a bit when i was younger , we literally never meet now unless we bump into each other on the street. My brothers have a good relationship with him and see him relatively regularly so they are going.

My brothers and mother (she’s not invited, divorced from my late father) are trying to guilt me into going because of ‘family’

AIBU to hold firm.

I do a couple of girls weekends away during the year so it’s not like I don’t head away or don’t have the money. I just don’t want to give the time and money to this.

If it was in a country where there was any other family, I might have considered it, but it’s somewhere where there is no family at all. And due to the fractured nature of the family there will likely be one other aunt there who I also haven’t seen in 20 years