Hopefully you'll find that additionally helpful!

At the price point of our properties, it ends up being a little over the 6 months of mortgage payments per property that the commercial lenders in my area like to see prior to lending on additional properties. 

Imagine being an auction company and offering damages to buyers when a seller can't close because they didn't calculate properly or foresee additional lien payoffs.

Additional costs for snow and heat could add up as well. 

Basically, the chain of title is unbroken and free of defects and transfer of title can take place with little to no additional work involved above and beyond a normal closing.

In addition, you're also well below the 2% (income-expense ratio) rule. 

This Contract Is Not assignable by Buyer unless otherwise specified inAdditional Provisions.So in the additional provisions area you just state that the contract is assignable (with or without perimeters). https://drive.google.com/drive/folders/0B1VD36mBqe1EfnJaMGl3MVBxX0Zva3RVbEY2amVuc1Y4SFh2X3JDZTVHeGxUUVRzaGdDMVU

But the MAIN discussion should be "how to get more than the 2.5- 5% down, with one or two additional paydays."

These are modern style homes so not sure if this would work in your market / style. 

With your experience, you'll be a great addition to the forums already.