If your relationship has gotten very serious, your girlfriend will probably try to find agreement in your faiths. I have many friends and members of my family who married within the church and later divorced. The idea of a rich doctor is almost antiquated.
Here are my thoughts as someone who grew up with a non-mormon father and as someone who married a non-mormon girl. Yes have moved away from family at 7 months pregnant to knowing no-one and starting from scratch and having no support network especially from husband who couldn't wait to get away and had the cheek to say he dreaded coming home some nights, poor him, I dreaded being home most days. She got engaged 3 months later. There are billions of other girls out there who I wouldn't have issues like this with. Unfortunately, this has led to a culture of Mormon girls who are absolutely obsessed with Disney and even as adults dream of being Disney princesses. And I resent being viewed as just the wife of a doctor rather than my own person with her own accomplishments and aspirations. I don't know if living vicariously through him will be enough. Think about what you want in a relationship. It helps put my small, first world problems into perspective.
Their thinking is something like this. That was enough for him. I just found this blog. The scenario where she refused to watch a possibly 'anti' documentary and wanted to watch church-sanctioned material sounds like a red flag. Mixed races, however, are NOT tied into opposing beliefs and mixed races don't try to "convert" each other. She will not marry you until you convert to mormonism whole cloth. I find myself oscillating between empathy, pity, and rage, but lately, it's been mostly rage. Never marry someone with the goal of a post-marriage conversion. I think in most situations its either you join or she leaves- either you, or the church. I thought it was beautiful that they included him in the circle, even though he was not a Priesthood holder.