I think everyone who has moved with a PWD will have a different experience but here goes with my mum. Her dementia was getting bad and so (with OH's agreement - vital) we moved her in with us. This was a two bedroomed terraced Victorian house in London so was not ideal. Having been with us a year and her having difficulty with stairs, we relocated 160 miles away to a house with a downstairs bedroom/bathroom/own sitting room for her - all accessible from the kitchen and this worked well as she had absolutely no interest in any other part of the house - some PWDs can roam and disrupt.
Mum's favoured living location would have been a flat above a shoe shop in Oxford Street but we bought a 250 year old house in the country. A big ask of her but because she was with us she felt secure, although in the four years she lived with us in the country she only went out to go somewhere, never ever ventured out to sit in the garden - but she did not do that when she was living on her own so we didn't worry too much about it, although getting her outside when she went for day care at the local care home would have been nice to get some vitamin D into her.
Sometimes she knew where she was, sometimes she thought she was in a hotel. Silly things mattered, like having pink flannels in her bathroom otherwise she thought she was in a hotel and would remove her possessions from there to her bedroom. We had to stick a sign on the bathroom door and the bedroom door. Fortunately she did not wander, but then (sorry for black humour) she could not get over the style or over the cattle grid!
Mum died last year. Would I do it again? I would think long and hard about it TBH. Few of us have done this before, we are thrust into it for all sorts of reasons - love, duty, necessity, etc. What they don't tell you is that you will have absolutely no idea how long this will go on for, which can lead to depression, anxiety, stress and so on. You will need to change your work/social habits, which might impact on your relationship with your spouse. You will have to learn to deal with all sorts of personal necessities as health declines. It creeps up on you so don't be frightened of it but you need to be able to cope with incontinence, perhaps not washing or changing clothes, being shouted at (get professional help!). Your health will suffer. I could go on but that is depressing in itself and it is not all doom and gloom of course, it can be rewarding, funny, and it will teach you an awful lot about yourself.
