He should qualify for Social Security and definitely qualifies for Medicare, so $100k isn't meant to cover all of his expenses, but supplemental ones. Not saying that we couldn't do better (e.g. UBI in addition to social security), but any analysis of his budget needs to factor in his social security. He also mentions paying off his home, so it sounds like he may have some equity. Ideally he shouldn't have to, but at his age tapping into that equity is a real consideration.