This was almost my story, except I didn't become a SAHM, but continued my career, which accelerated, and have risen even higher since leaving my EXDP.
What I don't understand about these kinds of men is why they are not honest about not wanting to marry. Yes, the woman they are with would probably leave the relationship straight away, but he's only delaying the inevitable by pretending otherwise to keep her.
I left my EXDP after a 7 year relationship, 5 of those engaged, when I'd asked about getting married on 5 year engagement anniversary, and he suggested (in all seriousness), that we do it at 10 years of being engaged 
Having kept my financial independence, I walked away, not only because of that delay, but he had also became resentful of my career and earnings.
I do think a man who wants to marry a woman he loves will do what he needs to make that happen. Obviously if she doesn't want to, that's a different matter, however I do think he needs to be really into you in the first place.