Sitter Job in Perris, California

My children are 11 and 12, my son will be 13 in June. I am in need of someone to come to my house in Perris, CA and sit for my children while I'm at work. I'm just starting a new job and am only going to be making $400 a week and have to drive quite a distance, so I'll be spending $150-$200 a week in gas, so I don't have a lot to spare for a sitter. The children pretty much take care of themselves, so there's not a lot of work to do. Just need someone to be responsible for them and watch them when they go out to play or take them down to the park to play sometimes so they are not cooped up all day. Any age from 16 and up will do. I'm looking at paying $50-$75 a week and the person will be able to eat our food, so they don't have that expense or I can bring them to you but I still only have this same budget to work with. The hours would be 6am to 7pm approximately. I'm just starting the job, so I don't know how long the commute is going to be yet.