What demonstrates consent (a "yes" via email).There are certainly more, but those are the ones that came to mind right away.

You don't need to be an expert to be competent in what you are doing, demonstrate competence and you'll be fine. :)

To demonstrate that going by % numbers, might not always work, let me give you an example: -I own a house that is worth $850K.

The challenge  will be to demonstrate that your intent did indeed change from sale to hold to sale and that you weren't just giving the perception of hold so you could 1031.You've got a good plan together and I'd encourage you to simply hold the property over a year and evaluate.  

In contrast, for a duplex, you only need to demonstrate sufficient personal income, and you can also use additional income from one of the units to help qualify for the loan.

Demonstrate that you are willing to live beneath your income so as to accumulate some.

You must be able to demonstrate the ability to service the debt.

For an eviction, a period of at least two years with no missed or late payments to landlord or utilities seems like that person has demonstrated a change. 

Therefore, holding rentals in your S-Corp in hopes of using the losses to offset your active income is not an appropriate strategy.Unless: You can qualify as a real estate professional and demonstrate material participation in your rental activities.

Personal financial management is important, you have demonstrated poor money management by getting those cards "loaned up", pay them off and terminate-close the accounts.