Pre approval and lack of credit

[Bryce Hopson]

Hi everyone, I am 20 years old and I am trying to purchase my first rental property via seller finance. I have found a great deal on a tri-plex and the owner wants to do seller financing, but needs you to get a pre-approval before he shows the building. With the lack of credit I have I can not get pre-approved. How should I go about this? 

Thanks in advance, 

Bryce