[Arguendo]

I got the impression he was simply making the building available to congregations displaced after leaving the Episcopal Church (which in some cases can legally keep their church buildings), giving them a place to keep worshiping independently as parishes.

Besides, most conservative Episcopalians are fairly Protestant, both culturally and theologically, and would probably choose a more traditional Protestant denomination such as the Presbyterian Church over the Catholic Church if they did switch.

[Salvation]

My experience (and there are several here on FR) is that conservative Anglicans will usually end up in the Catholic Church.

Former Anglican Bishop, Catholic Convert, Jeffrey Steenson on Anglocatholicism [Ecumenical]

Jeffrey Steenson: Why I Became Catholic [Address to Anglican Use Conference]