Not many people who think 6000 per month is worth looking after 5 teenagers for, would have a 5 bedroom house in California.
Considering you have to feed them from that money, pay property taxes, buy lots of loos paper, do their laundry and have the cops turn up when they deal drugs, sounds to me like they are not paying enough. 1000 a month would not even get you a rented bedsit in London.
Frankly, I know a lot of parents who would pay the federal government to take their older children away.