The initial cuz you get is 90 days non-o for retirement purposes, only this can be extended for 1 year.
The money needs to be in the bank for 60 days and not go before 800k. Then you can apply.
Btw when you apply for the non-o you need to have more than 15 days legal stay left. I didn't and had to get 30 day extension. After 15 days you get non-o for retirement.