Pure Prospecting needs a licensed property-data source — owner of record, equity, mortgage, distress signals, contact append. Below is a side-by-side of the realistic options, a recommendation, and the connection config. Licensing requires Mike's sign-off.
PURE recommendation
ATTOM Data — primary · Regrid parcels — overlay
ATTOM gives the deepest nationwide coverage (assessor + deed + AVM + foreclosure + owner) on a clean REST API with reseller terms that fit our per-org model. Pair it with Regrid for parcel boundaries/maps at low cost. Start ATTOM on the pay-as-you-grow tier, add contact append from a skip-trace provider only when prospecting volume justifies it.