This is a subject that needs accurate information as to the legal side, and useful information on the human side (I'm not saying you're not giving it, but there's a bit of a cloud). If you'd signed in as member rather than guest, I could have emailed links that were useful to us when my wife's father became troubled by dementia. It took us about two years to complete the process, much of which was convincing him that it was necessary. It was at least a year later than ideal; he was reasonably well off, and so targeted by salesmen from companies you would have thought would know better. He was of a similar age when we started the process.