List building: owner occupied or a rental?

[Thomas Morgan]

does anyone have any tips on how to narrow down county records to non-owner occupied houses that are used as a rental?

I live in resort area so we have tons of vacation homes whose mailing address does not match the property address (which is a good start). These are second or third homes etc that the tax bills go to the main residence or a business. The point is though, I don't want to market to vacation home owners.

I want to build my list of homes that are currently used as a rental.

So property address not matching mailing address is a starting point but need to refine further.