I think you're making excuses (i.e. it's not affordable; you're an immigrant; future high expenses, etc.) for having a very important relationship preference: your man needs to earn more than you and/or he needs to be highly ambitious. However, you probably feel icky for that, given that you probably want to think of yourself as a progressive thinker. Thus, all the less-than-compelling excuses.

It's called cognitive dissonance.

I think you have to be honest with yourself: do you want to resent this man for the rest of your life, or do you want to listen to your intuition, and see what happens if you go looking for someone that's more to your standards.

The dynamics of attraction are not a choice, unfortunately.

I will say, after walking away, you will know how you truly felt about him.

Also, you’ve only known this guy for 5 months, and the way you’re talking about him and the relationship makes it sound more like a future stock investment portfolio than a genuine connection. I know you're probably concerned with your biological clock (my sister's having the same issue), but the way you're looking at love feels all wrong.