I'm not sure. I'm thinking he's wanting her to move in so he can have a live-in provider. It may be a codependency issue, too. I'm not putting too much weight on the "Taurus" bit but do know (from my experience and it's description) they're very stubborn.

I'd be concerned that once the honeymoon phase wears off and the sex becomes predictable, he'll no longer have use for her. If he's financially bounded to her, he'll seek out this "passion" elsewhere with other insecure and needy women.

I agree though. He definitely knows what he's doing.