Nothing wrong with that. I highly doubt that Trump, Sr. has the time to defend himself in multiple trials, run for President and run a business. Mar-a-Lago is a business and has always been. It’s also a fundamental part of estate planning. People make the same decisions at his age, although not at the same scale. I certainly have and I am younger than Trump.
I would imagine that Trump was seriously considering that he’d be assassinated while in Georgia, and making arrangements re his estate.