@Teddy1960 I am with you on this. Not only did I need the mental stimulation of work, I needed the money. My husband had no income after the age of 49 luckily he had been a very high earning executive prior to that so, there were some savings and investments. Somehow I managed. But accessing his early retirement was not possible until his was 55 (and it was penalized for taking it early) so I had 6 very difficult years. Sold the house, worked at a job which I did not like that much but paid well and provided for the kids. (We also had the difficulty of him loosing his job before he was diagnosed so the company took no responsibility for our financial situation and he received no disability) I had to work.
I hope you find a way to get him the care he requires while you continue to work as long as possible.
Ask for help everywhere you can, church perhaps, look for walking groups (or whatever his interest is) and the fact is you will most likely have to shell out some money...like young mothers must for childcare...a portion of your earnings. Maybe he has some friend who is already retired who would take him on one day a week. (We have a wonderful friend who for a long time while I was working took my hubby for Fridays for years). MY last three years of work, I worked mostly from home and only part-time...a very flexible contract and situation.