Franbern, we had this sort of situation with dh’s old aunt - plenty of money but hated spending any, and thought the other residents (themselves nearly all elderly) in her small block of flats should help her ‘for love’.
Never mind that she’d never have done the same, except as a one off! Before she started getting decrepit she once told me, ‘I’ll do it once, but I’m not getting involved.’
We lived a good 2 hours away so obv. couldn’t be popping in all the time. Eventually I had one of the residents on the phone, wailing that they just couldn’t cope any more.
Dh tried to arrange paid carers for her but she sent them away - too loud, too ‘common’, you name it. She just hated paying.
The hassle my poor dh went through in order to - finally - move her to a care home, was unbelievable.
As for paying for that, she refused to write the monthly cheques, since, ‘If they know I’ve got money they’ll find a way to steal it,’ so dh had to pay, and every month get her to pay him back.
I can’t say I was remotely sorry when she finally died!