I require a high credit score 680+ and two prior landlord references.

At times, the seller may back out, we may uncover bad things about the property during the due diligence period which will cause us to back out of the deal, or financing may fall through.What makes it even worse, we, as investors, may incur some soft costs (costs incurred prior to closing) which end up being sunk costs.However, as investors, we are relentless in our pursuit of cash-flow.

In this case, would the IRS reject a prior return's use of a DIY if a full engineered study supports or exceeds the deductions that it reported?  

Most, if not all screening tools do not include a comprehensive rental screening with a renters prior rental rating like Mayistay. 

The Lender changes the loan to installment once they pull credit report for your seller, and omits it under 5102.4 guideline as paid by third party owner of prior home.

I think if the investor has had bad experiences prior, then Yes, a call from any sponsor comes with a cloud of anxiety on what the call is about.

I have an applicant who says she lived in the Dominican Republic prior to the 2 years she's been at her current address.

And even here, you still need to be "active" to research who you are lending your $$ to, and due diligence on the deal itself prior to investing your money.

This was my first property, I've owned it for about 3.5 years, and "started" in RE about 4 years ago (all stock market investing prior).

It was their prior excuse for being nonresponsive and you let them know that is not an excuse.