Just an update...I've since found out that delayed financing is performed using the current value of the home.Which means, all the various forum results I've viewed, as well as other media, which were all saying that delayed financing is based on the purchase price of the property plus the closing costs, were technically correct...

If they are at market rate and you want to keep them, keep them on a month-to-month to see how they perform as Tenants.

But if this is your first deal and you are stretching yourself to spend every penny you have I’d probably go the partner route before asking for seller financing and further stretch yourself.

These properties are likely in rough areas and need extensive work.  

Lastly, if by "calculating", you mean performing a financial analysis to determine projected income, the answer is no it is not more difficult to calculate.

Keeping it broken out by vacancy, maintenance, capex, and other categories does nothing to improve your performance.

Research and find areas that still performed well in 2019 and before.

Make sure your lease states when rent is due, when a late fee will be applied (if any), and when a notice to perform will be delivered.

“Loss of potential income on the house” are not damages...by any stretch of the imagination.

With 780+ credit and 40% down coming from our own home sale proceeds, using our current lender's "customer for life" program to re-apply, and with perfect payment performance over 8 years with them, is the 28% front end DTI written in stone, or is there flexibility?