FBJ,
This is what you should do, seriously.
Most ethnic people stick to their own group. They come to the USA to work. They don't know crap about America. There will always be a central figure in their local communities who knows how to fill out immigration papers, who can get them a job and ID, and basically facilitate their being here. Think of them as the "boss".
Go to your local Chinese joint, particularly the worst and sleaziest one. Strike up a conversation with the owner and tell him or her that you need a housekeeper. The boss always gets a cut, so if word gets back to him about a job opening, he will stick some chick with you. Make sure when you "order" this girl that you make it clear that you want a chick of legal age who is fit and cute.
The boss will stick the chick with you. As long as he gets paid he does not give a shit what you do with her. You can screw her, make her clean the shithole you live in, then screw her again. Best of all, you don't have to treat her like anything other than chattel. Plus, it's all legal, more or less.