Deals can be made by harnessing the power of off-market strategies.

6) The primary benefit of the C-Corp that you seem to be attempting to harness appears to be "fringe benefits" - this is unclear to me and worries me.

We can effectively elect to group all of your rental activities as "one" activity so your spouse must only show she participated in the "one" activity (all of your rentals) for a total of 500 hours.So your spouse can be a real estate professional, but you will need to group your rentals into one activity to harness any real benefit unless she strategically materially participates in two or three rentals for 500 hours per rental.The grouping election by the way requires that you group ALL of your rentals.

We use HAR a lot, but I wondered if there are other suggestions for websites with helpful local data.

I believe it's more along the lines of if you are successfully completing transactions without issues, HAR/TAR won't bother you much.

Too steep to walk on use toe holds and harnesses are a nice feature.

Use the HAR lease. 

Once you get licensed, if you dont sign up with HAR and get MLS  access, after 6 months or so (When they catch it) they will make you join, or else they deactivate your license until you do. 

Hardy har har

So, we finally put this house on the market two months ago, opting for a FSBO approach that included an additional fee for listing on the MLS (HAR, Trulia, etc.) and also a contract negotion add-on from the broker who physically listed the property and manages the listing, e.g. price changes.