Buying a duplex from my Dad's landlord

[Courtney Murphy]

Hello,

I am just starting out and just purchased a house for STR. As rents are going up and my parents are on a fixed income, I would really like to help them out. I want to approach my dad's landlord and ask him if he would be interested in selling the duplex to me. What is the best way of doing that? Should I tell him that his tenant is my dad? I have the name and address of the owner from the Tax assessor's office. Should I mail him a letter or dig around and try to find a phone number? Financing might be tricky since we are tied up in this STR. Any suggestions appreciated.

Thanks!