He waited out a majority of the price fall, then when it got near where he thought the bottom should be, he bought.
No use worrying about whether you hit absolute bottom, buy something and get on with your life. Also, every year you rent is one year longer you’ll have to pay a mortgage once you eventually do buy (not exact, but close enough).
You can come up with a million reasons to sit on the fence. But at some point, you gotta roll the dice. To me, that point is now.