My mother had always wanted to go on a river cruise down the Rhein. I planned this for her 75th birthday as she'd looked after my DF (who had Parkinson's & dementia) for many years & he was in a home.
I thought Saga would be best as, although on the face of it, it's rather expensive, everything is included-travel to/from home, drinks, food, most excursions, smaller more friendly ships, tips, so not so expensive when you consider how much other cruise companies add on to their basic price.
I was going to pay for myself & also willing to pay her costs. Got in touch with all relatives saying what I'd planned & suggesting that, if they'd planned to send her a present, that they might like to contribute whatever they would spend on her birthday present to the cost of Mum's fare. I contacted my siblings inviting them to join us (at their own expense) telling them that my intention was that, we cover my mother's costs, though I was willing to pay for her on my own if they didn't feel able to contribute (I'm better off than my siblings so wanted them to join us & if that meant they couldn't contribute to mum's costs, that was OK). As it turned out we all went my siblings, my mother & me, siblings being able to pay for themselves.
My siblings, mother's brothers, sisters & our many cousins managed to pay for mum's fare & spending money.
Mum had a great time & died 18 months later still talking about her amazing holiday.