On that scale we have a range of properties in our portfolio, even though I have started to trade out properties from the lower end back in 2014/2015, and some cashflow a little better - however, when you look at the total financial picture there is a lot more than cash flow: obviously appreciation, but also principal pay down, turn over rate and soft factors like tenant quality and with that turnover cost.RE's primary superpower is equity, cash flow is secondary.

i.e. single proper Buyer agreement, exclusive buyer agreement, etc.Does the principal broker her a signed agency disclosure with this party?

The principal has hired an attorney years ago not sure what she has done.

Add in the principal paydown on the investment property which would be another 5k.

When you hang your license with the broker, you bring on certain liability as a salesperson, even if you're not representing any principals. 

While down payments and principal payments aren't deductible, inspection fees and other acquisition costs can be added to the property’s basis for depreciation.

mortgage principal will remain in the future

Did they suffer loss of principal during down cycles (or even up cycles for that matter). 

They analyze components such as cash flow, principal paydown, appreciation (both home and renovation), initial equity, depreciation, and interest deductions for tax savings, giving you a clear picture of individual gains and ROI over 30 years.

Yeah, I get the infinite banking principal and see many others leveraging the concept.