I think it depends why and what you are in. And the numbers do they stack up. Other things for non nationals is, do you understand the IRS and the real estate market in the USA with the way they appreciate/depreciate assets. You have if you have investment mind to make money, look at the fiscal angle. What is it going to cost me to borrow, where do you think the market will be, rental yields, depreciating assets.
There are some great deals in the US, if you know where to get them, and you know what you are doing.