I will be the only one on the loan. I am the only one with paid contributions to the marriage.
When I bought my first marital home with my pwBPD, I was the only one on the loan, but of course she was on the deed. This put me in a considerably WEAKER position, because she had claim to the house and could sell it from underneath me, claim rights to live in it, etc, etc, and I would still be the one "on the hook" for the mortgage. The bank would come after ME (and did, aggressively), and they said ":)addyBear Wife, who? Don't know her. Now pay!"
When we bought our second home, I made sure we were BOTH on the loan. Even though she had zero income and less-than-stellar credit, and we probably paid a little more in interest, at least we both know we're on the hook for the mortgage, and we'll BOTH get the calls and the certified letters and the door knocks next time.
I also bought him a car, so, within the first year, if I choose to divorce him, he really has little recourse.
Are there still payments due on the car? Do you plan on repossessing the car out from underneath him if you get a divorce? Or is that another thing that you'll keep paying for?
Please don't take any of this as a push one way or another - if I were in the same position again, to buy a new house, to sign for a car loan (and I've done both), I'd want to have thought a little more about the "really bad worst case scenarios" and relied a little less on the "I can just take care of it myself worst case and at least she'll have a house and a car"
And let me elaborate on that, too - I REALLY DO want her to have the house, if possible, if we get a divorce! And I am REALLY GLAD I bought her that car 5 years ago because now it's hers and she's all set.
But what lesson does that teach her about responsibility? When she gets things handed to her, it starts to become an expectation. All the "I'll try harder"s in the world don't make up for that implicit lesson that "... .but if I DON'T try harder, you'll still take care of it, so phew!"