Covenants against selling homes to people because of their race or religion have been illegal for almost 60 years. He could not force his buyers to refuse to sell to non-Catholics.
I think the law get more complex when we're talking about designated private communities.
It IS funny how hyper-concerned we get over the legalities of it all when it's Catholics and a private relgious community we're talking about..and not some liberal, selective, "artist community" subsidized with city funds for attracting the coveted "creative people."
Anyways, my guess is this is all probably moot because the website for the development does not mention any restrictions on who can live there.
I think as former Marines go, being one myself, this multi-milionaire has some sound ideas, but!
Reality bites us all sooner or later.
And with all those disposible funds, "somebody" is going to get greedy. More than likely the "somebody" may well be from within. In fact, as some folks put it, greed was what got Judas all fired up in the first place. And he, too, was an insider.
Still, I wish him and his luck!