My grandpa built his own house, and it was an amazing house, on a lake, surrounded by national park because he built it before the state stole the land to make a park. Its gone though... After he passed away, the new owners burnt it down in an insurance fraud and then built an ugly mcMansion
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grok's version of your grandpa's house

Too small, and it wasn't literally on the water
I bet he could tell you every detail, even ones you couldn't see. Decisions he made in the process that he would've done differently that you don't even notice, that he lived with and accepted every day. I hope to experience it soon.