Because he said "neighbouring" countries in his comment and he knows how this works. He didn't ask for any help. Then you're telling him to go to Laos,Cambodia, Malaysia. Why?
As suggested above,go for the 90 days Non-O based on retirement, then extend it another year at the local immigration office as long as you meet financial requirements. You can always get married later and change the reason for next 1 year extension if you want. More paperwork,though.
You might not have noticed the name of this group,but it's not about banks freezing accounts and coming up with time frames.There are probably better suitable groups here on FB,don't you think? There are several posts about this with exactly same question and no one has the answer.