Marci--I've been thinking about your husband...
one good thing you could probably get him onto is kelp powder in capsules. The remineralizing and all-around goodness would cause him to be less attracted to the junk food which is in fact starving him and poisoning him too, which would also affect the blood presure.
I know all about the resitance of the male...But this is an easy one. And it'll get results.
Apart from his worry about losing his work, there is also the horror of an accident on the road! This could involve many others...so, he needs to get the BP down.