Quick Google search:
"Generally, there are no restrictions on foreign ownership of a company formed in the United States. The procedure for a foreign citizen to form a company in the US is the same as for a US resident."
Until a decade ago, the rule of thumb was never spend more than 20% of your salary on rent. Then it changed to 25%. Now everyone's saying 33% like there's some sort of thought behind that number other than "We want more of your money"...