Wow!
I'm shocked at the response to this question.
I wouldn't miss a family gathering, even if it was going to cost me. My grandmother was the matriarch of the family, and she arranged family gatherings on all the usual celebrations like Christmas, Easter, Guy Fawke's, birthdays and special anniversaries.
I was lucky to see the whole of my family (immediate family, uncles and aunts, cousins on both sides of the family including families of partners and extended family regularly every year (at least several times a year throughout my childhood and into my early twenties. My grandfather was the senior caretaker of various schools in the town I was born in (Burnley), so he always lived in the caretaker's house on site (do schools have them now?) for most of my early years until he retired a couple of years before my grandmothers passing. So, most gatherings were held in the school hall; and a caterer and DJ would be booked. Because we had regular gatherings, any costs (DJ and caterers) were often shared between my grandparents, their siblings and their children (my parents and aunts & uncles). The gym would be opened for the kids to play around on the trampoline and other stuff (bean bags, climbing ropes, horse etc) and if it was a major celebration like an engagement, wedding, silver or golden wedding anniversaries or significant birthday dates, e.g. 50th birthday), they would book rooms at one of the local hotels that catered for such celebrations.
Family was important to my grandparents, and I can thank them for where I am now because of their unselfish care, generosity and life advice when I was a child and youth.
When my grandmother passed away (the same day as John Lennon), the only family gatherings I've been to in the last 42 years are the odd wedding, a few engagement parties and lots of funerals; so, if I was invited to a reception and after party for a family member, I would jump at it no matter the cost.
If the invitation was from a member of my extended family, would be happy to help out as these celebrations have become very expensive over time so helping a new couple is what family does (at least I thought they did).
I so miss my family and after the last funeral I attended in 2019 (my fathers), I suggested to my cousins that we should maybe have at least one family gathering each year. I'd planned to host the first of these in the summer of 2020 with invitations to my siblings, cousins and their families (All my family in the generation above me are now gone apart from two aunts who live in Australia). unfortunately, the Covid restrictions at the time put a stop to that.