I spent 4 years living in Vietnam (and Laos / Cambodia). Never once found an ATM that worked with my card (Chase bank) and everyone I know said that they were limited to about 2m vnd in Vietnam, which is about $85. Never mind having to pay fees on every transaction.

It is absurd to have to get some special card or bank account. It is absurd to be limited to a tiny amount of money, I certainly wouldn't have been able to pay rent that way.