School visas (usually the F-1 or J-1) are almost always only available to students accepted into academic institutions in the USA and can prove they have the resources to fund their entire tuition and living expenses. (There are a few work arounds but they're not really Kosher and are very expensive.)
Bottom line: unless you are engaged or married to a US citizen or eligible green card holder, a visa to come to the US to look for work as a houseboy is practically impossible to obtain. And given recent events, will be even harder in the near future at least.
