Look on zillow and see how long houses are listed before renting (but be aware that zillow often doesn't know a place has been rented so their numbers can be biased long).If she has been a good tenant and paid reliably then I might offer to split the difference and go up just $100.

The only item I would add is that for 506 b offerings an investor must have a prior substantive relationship with a syndication sponsor. 

We have a PM for all our properties and the only time we interact is to approve MX items over $400 or have a question about a statement.

This means the LCC is technically not in good standing, but is still listed as active by the state.

Pick one market, preferably the market in which you want to live and have your REALTOR send you all new and changed listings in email each day.

The public records show the house was listed for Zillow's full estimated value twice in the past year.

The rest of them are suspended and listed as such on Form 8582.

The initial goal was to find these properties for flippers or builders and then build up my future pipeline of "listing back" opportunities. 

For the takeout lenders lower pre-payment penalties should be at the top of your list with no or lower seasoning periods.

I would love to get a better understanding of what duplexes in this area actually sell for, and not just running my numbers based off of initial listing prices from owners.