Do I have an opportunity to wholesale?

So I found out a home in a previous neighborhood I lived in has sinkhole damage, I do not know to what extent. I believe he is an older gentleman. His wife also died a few months ago. From what I gathered from a family member he will be moving out temporarily for 3-4 moths while it is fixed. Problem is I live in another state. How should I proceed? Send him a yellow letter? How do I make myself stick out so he reaches out to me? This guy has lived there for probably 30 years I assume he's seen hundreds of yellow letters..