You could just win the lottery actually, who knows?
Seriously now, IMO, you shouldn't base your decision on money (yeah, I know, money is important . but I'm telling you this from my gut and I grew up third world poor - I am still poor actually )
YET, I won't base any decision on money because at the end of the day, money does not buy happiness (even if it's more confortable to cry in a frontbeach villa in Hawaï than in a studio in Harlem)
What was your dream school when you started your application journey? I'll recommend to stick to that. And listen to the voice inside of you (Now DON'T tell me there is no voice inside of you, I'll get angry ggggrrrrrr (just kidding - I assume being dinged from HKS drove me crazy).
When you look at the ocean, you don't question whether it is big or not. You just know it is. So for your choices of school, it's the same. Pick the one you don't question about.
Is your dream school worth the 150K + investment ? My answer would be yes, because that was your dream school.
I'm an international student and if it took me 1 million in debt to go to HKS, I would (oh ... wait a minute, would I?) because that's my dream and this dream happens to be a school that gives undeniable credentials and open many doors in my continent.
You're also an international student, so I assume you know how HKS shines big time (not to say that Chicago and Georgetown are not worth it, but i can tell you that almost all congoleze citizens know about Harvard).
But that's easier for me to say because I don't have kids yet, I could go to HKS and eat pasta all year long that I would still be happy for the opportunity to live my (VERY) expensive dream. Maybe if you have bills to pay and if you raise a family while you study, that's different.
Hope my fifty (crazy) cents helped!