Getting my Mum into a care home seemed like an impossibility but it wasn't in the end. I was amazed. I kept saying to the management about the DOLS or deprivation of liberty safeguards when she said 'no way jose'. But they've never had to do it. I spent ages working out scripts regarding work needing doing on the house. Some people suggested on here about saying the doctor says you need to go in for a while. I rejected that one. It was all very nerve wracking. As you say, very few of them are going to say 'yes please' so we didn't go and see it before. On the day I said we're going to take this garden waste to the recycling centre which we did and then we went to the home after. I had been mentioning it a few times. And then I basically lived there, apart from the night times, for a few weeks, which isn't what's recommended but I have no regrets. Our home didn't have to meet Mum beforehand, we did all the assessment stuff with me providing the info.
This all sounds rosy but it hasn't been, because it's not easy to get the PWD's needs met in the same way as you did at home. But my Mum turned out to be at the stage where she couldn't remember her old home and identified her room as her safe space.
I haven't read all the ins and outs here, but if you're self funding, go and do the homework on what you consider is the best of the bunch.
I was convinced I knew how badly it would go in terms of getting her through the door but I was wrong. It's hard to tell til you go through it with them.