As far as your husbands goals go, have you ever actually put something that big up there? There's a good chance that it might not fit as well as you think. If it does then great, go for it! But I'd recommend at least testing it out first. Just my two cents.
EDIT: I don't know why you would post pics of that here though, you have nothing to gain from it and neither do we so it's probably best if you don't.