I did. We were out-of-towners at the time, so I would use that to build a strike list of 10-20 properties. We would fly in and do as many visits as we could schedule in a weekend.

Currently at 8 doors (that SFH, a tri, a quad), but now that we live in the area I typically just run one or two at a time in a spreadsheet instead of cranking through 100 in one go.

I find the list much more interesting than the insurance (I'm a big boy who can do my own risk evaluation). I only invest in one market, though (Atlanta), so not sure I would pay $100 for a nationwide list.

How do your internal valuations compare to the Zestimates? Zillow's data is better than nothing, but I know a lot of folks track their net worth through things like Mint/Personal Capital who might be interested in a more accurate daily/weekly/monthly valuation tool. I feel like that's how Zillow got their initial users ("You can look up the price of any house!") and if you could figure out a way to expose that data you might be able to get good leads out of it.