A platform that updates their data daily or weekly is covering a staggering cost in order to provide that to the end user.

Then figure aprox what your refi numbers/value would be given those rents/expenses at a stabilized point,  and that to me is your "all in" - From there it becomes an exercise of what it will take to get to that point or property condition?

The lender at that point can exercise the Due On Sale and it becomes a problem for the subto buyer, who now has to find new financing or lose the house to foreclosure.

The market "sees" hundreds of millions transacted daily. 

My daily job is to buy commercial real estate.

Naturally, they are your competition and the daily rates need to be taken into account.

Facebook is only too happy to keep presenting this kind of stuff to me daily. 

On a more enterprise scale, I employ RevMax software as well as a fractional revenue manager who looks at the prices daily on a market level and a comp set level. 

And this doesn't even hit on the dealing with contractors side, which need daily oversight if you want things done correctly.  

I'm amazed and delighted daily by Lady Landlords FB page and highly recommend joining at least 2 Landlord FB pages as well as these here in BiggerPockets.