Those hitch mounted racks are pretty nice. When you take them out of the hitch reciever, you can't even tell there's anything "on" the car. (the reciever sits low, under the bumper.)

If your husband is worried about how the car will look when it's NOT carrying bikes, the hitch mount could be the way to go. And if it's the only thing that will fit on the Cadillac, well, peachy...

(putting the rack in and out of the reciever is pretty quick and simple.)

You get to have a sedan that can carry bikes, and he gets to have a sedan that doesn't look "completely ridiculous"!