Mailings and letters! -New investor here, needing resources.

[Ethan Moore]

Hey everyone! I know several of you are big fans of finding deals via mailings. I currently have 2 rental properties found on the MLS. (House hacked them)

What are some great resources I could utilize to start spending marketing $ on mailings? Also resources for creating lists and finding those address to mail to? 

Its hard to find a great deal on the MLS and I would like to use the BRRR strategy for my next property. Thanks in advance!