Selecting the location based on these kind of job is really not a good idea. It would be better ,if he choose the city first and then try searching jobs around that area. I would suggest to select the place where public transportation is easily avialble, otherwise he has to get driving license and ofcourse a car.

As he would have a green card (lucky him), finding a job won't be any difficult. Go to any store and talk about their hiring.

All the best.