Landed an interview for a 2022 SA role - There is a catch however

I landed an interview at a small boutique for a 2022 summer analyst role. The program is for recent graduates. The firm is small, and does not have allot of deal flow. Here is the catch, the firms interns are unpaid and are expected to work 7 days a week and work 80 hours minimum. It is not remote either. I was thinking wtf?? this cannot be serious. 

If i were to get an offer, would it be a horrible idea to take it? I do not know how I would be able to live in the city unpaid.