Eating disorder treatment

So I thought I was going to a residential program and dropping out of school for a semester to get treatment for my eating disorder but it’s literally going to be $20,000 and my family can’t afford that. I’m stressed bc I withdraw tomorrow and I don’t know what my options are. I need help but we’re so strapped for cash. I’m just making like so much harder for everyone around me and I want help but I don’t have the resources. I don’t know what to do.