First property - Letter to seller

[Daniel Giacomazzi]

I am considering buying a duplex and living in one unit for a year as my first rental property. With how competitive the market currently is, I want to do anything that will possibly give me an advantage over other offers. I am considering writing a letter to the seller. 

As a new investor, what is the best way to go about this? If it were my forever home, I would write about why I love it so much and wanting to raise a family, etc. I appreciate any advice!

Thank you in advance!