The best I've seen for STRs is 80LTV on purchase and 75LTV on cash outs. 

The second is a rehab property that I purchased for myself, I purchased it out right for 100k.

Purchase price: $75,000 Cash invested: $600,000 Sale price: $269,000This is my largest new build development to date.

Deduct NEW property taxes after you buyDeduct home insurance costsDeduct maintenance percentage, typically 10%Deduct vacancy+tenant nonperformance percentage(we recommend 5% for Class A, 10% Class B, 20% Class C, good luck with Class D)Deduct whatever dollar/percentage of cashflow you wantNow, what you have left over is the amount for debt service.Enter it into a mortgage calculator, with current interest rate for an investment property, to determine your maximum mortgage amount.Divide the mortgage amount by either 75% or 80%, depending on the required down payment percentage - this is your tentative price to offer.If the property needs repairs, you'll want to deduct 110%-120% of the estimated repairs from this amount.Be sure to also research the ARV and make sure it's 10-20% higher than your tentative purchase price.As long as the ARV checks out, this is the purchase price to offer.It is probably significantly below the asking price.

That ensures you don't spend it on other things and that you know exactly how much you have available to spend on the next purchase.

So if you purchased one 4-plex each year, after 10 years you would have about $12K per month in cash flow.

Im looking at purchasing a duplex in middletown, Ohio.

For an auction.com purchase in Washington you have 2 options. 

Have you considered using a down payment assistance (DPA) loan/grant for this purchase?

Maybe it’s just gut feel, but for some reason It FEELS like these two scenarios will provide excellent opportunities moving forward, while fishing for notes to purchase at significant discounts to current principal enough to yield sufficient returns doesn’t seem as promising.