We have found houses the traditional way - through the Multi Listing Service (MLS), through foreclosure auctions, off of craigslist (that really weren't scams!)

My issue is that I come from a low income background and have fought my *** off, pardon my language to get to where I am now and comfortable.

If this is the case I would hold off until you see a monthly payment difference worth pulling the trigger on.

I found an off market 4 pack of houses that seem to be in great shape.

I believe the main trade off is liquidity and transaction costs. 

FYI there are also products to remove stains to where you place it, leave it, and practically peel it off like school glue once it's ready to be removed.

Make sure with a blanket mortgage that you're able to sell off a property if you desire.  

Yep, good luck with that right now... since they raised the min loan and min house value it cut off many of my exit strategies, and is a real challenge for attempting BRRRR in many of our Ohio cities. 

This does not include the tax write-offs for new systems and the expense of installing them.

DSCR loans are based off of down payment, credit score and either actual or market rents so it helps to supercharge an investor's real estate goals and net worth.