You took $20K in cash (which is an asset) and presto change-o turned it into a $100K asset (the house) with the aid of an $80K loan. 

At this point it can be a quick/dirty from rent-o-meter or Costar if you're lucky enough. :) No need to visit comp properties just yet, but it's good to have some specific data to that zip code or niche. 

20% down payment - 7.5% interest - 12 months I/O - 20 year amortization with a local bank How did you add value to the deal?

Seller wanted U&O (use & occupancy) agreement, saying they plan to live there for a year and pay rent.

If the management company screws up and makes a claim on their own E & O policy is the language something that the E & O carrier now subrogates to and comes after you for?

And that average owner is probably 60+ y/o.

PS I live here in Lake O as well and know most of the HML folks in the area. 

I realize my comments here sound 'contradictory,' but there are many ways to achieve similar results, w/o coming across as a 'sales type!'

Send a request for reimbursement for your costs to the agent/broker making note that it was her error if she doesn't want to pay, you will be submitting the claim to her E&O insurance. 

Rent-o-meter has a free and a paid version.