.- Interest rate is at historical low, so low that the only way to go is up.

If it were me, I would require a yearly subscription, to even out the revenue stream, but it could also be done on a true monthly basis with a higher charge for those who don't want to pay for the whole year.Even if the marketplace doesn't have historical data on its own, they should be able to gather the purported historical performance from the sponsor, and verify that in some way.

Competition AnalysisOccupancy RatesRent Historic Growth RateRents / Costs by unit type, class, square footageDemographics / Employment ForecastsConstruction ForecastSales CompsETC.Interested?

Not saying it doesn't need to be done, but expect higher than historic vacancy for a while. 

I have historically figured 8% in my area, but will be looking at that again as things are getting tough here.

They've had some historic factories, firehouses, etc come on the market in recent years.

you can invest in your own state 3/2 homes for under 100k plus you gain the yearly historic average of 8% equity ($666 monthly cashflow on 100k)

My company has a free rental grader that reports estimated rental income, the nightly average, and the occupancy rate based on historic Airbnb data. 

Basically I want data to show how rents and home values fluctuate historically through ups and downs in the market to better help me plan to handle a downturn.

This is a question that is asked in some form or other at least twice a month in BP, typically by a new New York-based investor excited by the "low" prices in some of Essex County's more historically neglected and difficult areas (Newark, East Orange, Orange and Irvington).