ok well when i was in a relationship with my ex i was always focused on enducation first because I knew it would provide for my future. the thing is it did affect us because as you rightly point out it does mean you won't see each other as much. and by him putting his work first you'll be lucky to see him and if you do you will probably see him tired.
if you really like the guy and think you can make something of it then by all means go for it, just be prepared to spend a few days away from him if work is busy for him (depending on what job he does) if he isn't your type then so what, opposites attract sometimes, you should go or more of the personality you get than the looks. ok i know its hard to do sometimes.