Should I buy a rental in my neighborhood?

[Justina R.]

Hi everyone, 

I have been educating myself to become an investor. I have about about 20k saved as down payment. This year I want to buy my first rental. 

I noticed a house (right across the street from me) is no longer occupied (rented) and it is not being cared for (tall grass). No traffic to the home. It's not on the market for sale or for rent. I looked it up. Should I reach out by direct mail (letter in the mailbox) to see if the owner is willing to sell? What should I say in the letter? I want to keep it short and sweet but not sure what to say. 

Thanks