1) A self funded MBA from a 3rd tier school is rarely a positive NPV transaction, especially when you view the opportunity cost. (A lot of hours that could be spent doing something else productive)

2) There is an enormous gap between the outcomes of top schools and everyone else.

3) There are very good schools outside the US and UK (Insead in France and Singapore, Rotterdam in the NL) but in general the further you go from the US, the less value from the MBA.

Am I saying that nobody ever should attend a foreign school? Absolutely not. But similar to law school, most MBA programs are very overvalued and overpriced.