We possibly all need training on how to be firm and assertive with our parents whilst still remaining respectful.
It is very difficult, both for them and for us, yet roles need to change. You have enough on your plate and can't afford three days and emotional fallout, nor can you run around at the crack of dawn delivering medication.
Inevitably even when care is in place there will be gaps, and an expectation you pick up the pieces. There will be plenty enough of interesting problem solving. (How to get heating when my mother kept switching the boiler off at the mains, meaning the timer clock was all over the place, how to pursuade her to have showers when she could no longer use the bath etc.) Ideally they will end up with a care package which provides good all round support and so limits your role to being a daughter and things you want to do (shopping, finance etc). Plus with permission from your parents to take over things they can no longer do, including organising home maintenance.
SS ought to be prepared to send someone round to review their home, and recommend adaptations. As well as the standard rails etc, you should ask about smoke/fire alarms, key safes and panic buttons. Consider if gas can be disconnected to everything bar the boiler. Tell your parents it is not working, or that "the lady" said. Then buy a microwave and some frozen ready meals, for "till the gas is fixed". Ask to borrow your dads tools, and then dont return them. Ditto car keys?! Blame "the lady" or "the doctor" if things like decluttering need to be done. Use your husband or a family friend if you need to tackle difficult topics like POA or taking over finance and setting up a mail redirect. They dont have the same emotional baggage and so are more able to come across clear firm and logical. Or in my mother's case, men's opinions carry far greater weight.
Look closely to try to spot where they may have lost capacity. Is there a pile of untouched paperwork? Are they able to change TV channel or is it simply stuck on BBC1. (My mother insisted on Sky when she moved to her sheltered flat which ended up being really complicated with me having to get specialist satellite people in, yet I then discovered she simply switched the TV on and thought she was watching Sky. I have the idea that I might switch the channel from BBC1 to Channel 5 and see if she comments about the change in programmes.) Are they cooking/shopping/washing/laundry/cleaning/able to use the heating/seeing other people like friends or neighbours.
Make sure that any support they need is fed into the assessment. Also apply for Attendence Allowance, as this will give funding to plug some of the gaps plus open the door for Council Tax exemption.
It is tremendously difficult for older people to accept care, the loss of independence, and having people "invade" their home. Inevitably it will be seen as part of a downward slope, to be resisted at all costs. In fact having the right support in place is liberating as it allows people to use the capacity they have, with the stress and worry. The transition however is difficult. The only advantage of dementia is that once battles are fought and won, they are forgotten.
And join us on the longer support thread. Its a long journey and not easy.