If you've been reading up on wholesaling, then you know you can use several strategies to find deals such as direct mail, bandit signs, driving for dollars or searching sites online like For Sale By Owner or Zillow.  

I'm building a duplex and using a lower cost builder who doesn't do any of the site work. 

@Antoine Martel I’ve thought about out of state but it seems complicated especially if I don’t know the area and can’t look at a property myself or manage it in person

@Johann Jells if your stuff isn't too complicated you might even try Mint.com.

The laws can be complicated and it easy to get tricked-up and shoot yourself in the foot with medicaid look-back periods, etc.  

There's a big difference between reading books, listening to podcasts repeatedly, asking for advice on this site where the responders don't have a truly vested interest and a mentor that you're paying that has an absolute interest in your success.  

If rotted, they can also replace window sill/framing on site, etc.

I know the real answer to your question is much more complicated than this, but hopefully this explanation helps:When you pay down the loan balance of your property faster than the loan term, this saves you a lot of loan interest payments. 

Have you done a member search on this site to try and connect with lenders?

https://www.forbes.com/sites/ingowinzer/2018/09/14/25-best-markets-for-rental-property-investment/#7110f7fb7cb7