We used to have a lady who cleaned our house (but I don't think she's taking new clients). It was private, not a company like Molly Maids. We have an 888 square foot house with a finished basement that adds another 400sf or so. She used to charge about $75 including the basement, $50 without the basement.
She came every other week and usually stayed for about 3-4 hours. Her price was reasonable compared to some others we spoke with. I doubt you'll find anyone for $30 unless your house is really, really small or you don't want very much done. It can't hurt to try, but realistically, it's probably going to cost you more.