Kudos on the idea.
In addition to the rack rate issue that others have brought up, I'm wondering if you've taken into account the SPG properties that don't offer standard/regular awards. For example, the Sunset Key Guest Cottages, A Westin Resort scores well on your report, however they do not have any rooms available for 30,000 points. Awards are at least double that.
From SPG's site:
Free Night Awards at the following locations require higher Starpoint redemption amounts either because the hotel does not have standard rooms or the standard rooms it offers have a mandatory Full Board requirement in peak seasons: Bora Bora Nui Resort & Spa, St. Regis Resort Bora Bora, and Le Méridien Bora Bora, Bora Bora, French Polynesia; W Maldives, Maldives; Sunset Key Guest Cottages, A Westin Resort, Key West, Florida; The Resort at Singer Island, Singer Island, Florida; Mystique, Santorini, Greece; Pine Cliff Residences, Albuferia, Portugal; and Cala Di Volpe, Hotel Pitrizza, and Hotel Romazzino, Porto Cervo, Italy. The minimum number of Starpoints required for a free night at The Resort at Singer Island, a Category 5 property, ranges from 24,000 to 64,000 Starpoints; the minimum number of Starpoints required for a free night at the Pine Cliff Residences, which is a Category 6 hotel, is 40,000 to 100,000 Starpoints; and the minimum number of Starpoints required for a free night at the other listed properties, which are all Category 7 properties, ranges from 60,000 to 140,000 Starpoints depending on the hotel, its category, its room types, the time of year, and/or its mandatory requirements. Redemptions at these hotels must be booked through your local customer contact center.