I'm in Los Angeles. The law and order here is not as bad as it is said. As long as you don't go to the black area, the security in the white area in the Chinese area (even in Mexico) is not bad. Our back door is unlocked, sometimes it's okay to leave the window open, and our neighbors are very nice. Asian food here is really popular, but the competition is fierce. Japanese food is the kind with higher salary. Generally, Chinese restaurants don't earn as much as Japanese restaurants. Manicure is very profitable. If you open a shop in the right place (rich area), you can give hundreds of tips. You still have to experience it yourself. Although the American economy is not good now, the people are still very rich. There are also many job opportunities. As long as you have the ability, you will have a good income. And a raise. The minimum wage here is 8 dollars per hour.

I hope these are helpful to you.