But there is NO COMPARISON of FB to PPC.  

Well it looks like you have most of the numbers to compare what your comparison on investment would me.   

My corp and I own 25 properties, but had I not sequenced this properly, I'd be stuck at ten (and the first nine were the C class properties!)

Below is a comparison between three no-income tax states.Sources for insurance and property taxes: Insurance - ValuePenguin, State Property Tax Rates - Rocket Mortgage.To show the impact of taxes and insurance, I compared overhead costs on a $400,000 property in the three states.

There it really makes more sense as one would find that number relative for comparisons.

There is a mid term rental group local run by @Mel Volland that would be a great source of infoFor a residential loan they are going to use the sales comparison approach for value most likely so income is not a factor..    

I also compare all properties using the same values to get an apples to apples comparison.

That would give you an apples to apples comparison in your own backyard.

REIV makes this easy and is the reasoning why I now have a predictable income each month. they do all the marketing for you as I said and all the metrics to the marketing and all the stuff behind being good and effective marketing. and follow up with REIV is push button easy. where I lacked before REIV was follow up and consistent marketing. which pieces to mail for which lists and follow up, whom to mail, whom to follow up with, when to follow up, putting the list on rotation 60-90 days, etc. now when I speak to a seller and they are there on price but not ready to pull the trigger or we just cant make the deal yet because of price I just click one of two different types of follow up sequences in podio and my VA handles all of the mailings and mail pieces each month.

If you really want a sequence I would look at slowly progressing in aggressiveness in copy.