@snowberry‘s advice to talk to to a social worker is good. This is unknown territory for you, it’s an everyday situation for professionals.
In the same vein, when I’m talking to medical insurance people for my mother, when I’m confused I say that right out – “This is all new to me, I appreciate any insight you can give since you see these things every day.”
Here’s my specific experience:
I started with the same reluctance to take away my mother’s independence and decision making, but more and more we have had to simply step in and take over tasks.
My father died years ago. My mother was living well independently but getting noticeably slow-witted. She has since been diagnosed with dementia. My brother and I checked on her more and had to step in and regularly talk about her finances and doctor visits to make sure she wasn’t neglecting things.
The first big issue for me was people who prey financially on the elderly. Once someone called and got $20 for their “charity”, they would start calling under multiple names and she would give to everyone. A guy knocked on her door and she signed a contract for a $15,000 bathtub with horribly expensive financing. We were able to cancel that.
So I took over paying her bills and we left very little money in checking and review the few checks she writes on a monthly basis.
A year and a half ago, things started changing more quickly. She had a small stroke and she totaled her car (nobody was hurt, thank goodness). Living alone in the suburbs wasn’t really an option. We tried with Uber for a bit but she just can’t learn new skills or habits.
So, what we had to do…
My brother and I agreed to share responsibility – luckily we don’t fight each other, we don’t have eyes on grabbing her assets, we don’t have different agendas.
We hired a lawyer to write up Power of Attorney documents. One is general, one is specifically for medical decisions like end-of-life care.
Power of attorney is important, because without it, you can’t talk to anybody about finances or medical issues. Can’t talk to the electric company, the realtor, the hospital billing department, the doctors & nurses.
We moved Mom to an assisted living apartment. We had to be firm and quick. “Mom, we need to know there are people on call for your safety. We need the support.” My brother was amazing and in one week signed a lease, hired movers, and set up the new place with the living room and bedroom looking just like home, with the same furniture and pictures on the walls.
We are also very lucky that with a small pension and medical insurance from her job, plus Social Security and Medicare, the apartment is affordable. We are selling the family house, which will put a bit in the bank as a cushion against catastrophe.
As @rojo writes, in retrospect we also let things go, glossing over the deterioration. It worked out OK in the end, but if I did it over again, I would have started planning sooner with my mother for moving out of the house and getting her finances in order.