The issue you are talking about has less to do with education and more to do with how you treat each other.
I won't jump on the 'family is above all' boat....I come from an abusive family, and I know plenty of folks who are better off with divorced work-a-holic parents than some with both parents at home beating the daylights out of them. To me, family is about taking care of each other as long as intentional harm (to self or others) isn't occuring.
I will say that forging forward without your spouses support will be damaging to your relationship. It sends the message that you don't care about their issues or concerns, and the spouse likely has valid concerns; education takes time, energy, and resources. There isn't any way to avoid education requiring some level of input, and that will mean less input on other areas of your life, including relationships. Even with a supportive spouse, that can be hard on a relationship. Have you really figured out what his concerns are, or are you just listening to the guys talking with alcohol in the system? Have you paused long enough to see his perspective, understand that he may not want to lower your current standards of living for some 'possibility' in the future?
Now, I'm not saying you shouldn't continue, but that if you want a committed relationship, you have to respect the relationship and the committments that exist. You owe it to both of you to really understand and appreciate your partners perspectives and to work to make decisions together, or to decide if you are willing to do this even if it means being alone.
I do know quite a few couples where one is professional and the other is blue collar, particularly where the professional comes from a blue collar background. I know, as a child of high school drop outs, I struggle with where I fit in social contexts. It has advantages; I can relate to folks from nearly every background, but I don't quite 'fit in' any where. My husband has a college degree, but his parents have the same education level mine do.
@Shelby - for me, that would depend. if they were still exploring life, learning outside the classroom, etc, I'd be ok with it. if they were comfy being a flea in the fur of humanity (read Sophie's World if you don't recognize that statement) I wouldn't be ok with that. I just don't value formal education as much as I value a student's desire to learn.