This already exists. J-1 visa (I think?) satisfies this, there are a lot of companies set up to do this, e.g. Au Pair in America. It's not free, but it's sign

This already exists. J-1 visa (I think?) satisfies this, there are a lot of companies set up to do this, e.g. Au Pair in America. It's not free, but it's significantly less than the aforementioned $25 / hr.