My sister is getting married in July 2027 and due to the location it will cost us £700 in travel and accommodation to attend. There is currently a destination hen party being planned for May 2027, 5 days in Ibiza, which is going to cost around £1500 each if the MOHs estimates are correct.
Will I be unreasonable to say I won't be able to attend the hen party? Partially due to the costs, but I also have a severely disabled child and don't think 5 days away will be feasible as it will mean my partner will have to take 5 days holiday from work for me to attend.
I would hope they'd be understanding, but this is my sister's second marriage and a lot of agro was given to me for leaving her first wedding at 8pm due to my child (who was a lot younger at the time) becoming distressed due to the noise, busy environment etc and it was stated that I could just not prioritise him and celebrate my sister since its her day.
Hoping to get some advice on whether this is reasonable of me to decline, and if so what could I say to not cause any drama?