A more ethical alternative would be to write a CRM in your own time, quit then offer to migrate them to your new one on the cheap in exchange for a case study.
That way you bootstrap a startup, get a paying customer, they get dedicated development (initially) centred around them and you don't have to work for $5/hr.
That way you bootstrap a startup, get a paying customer, they get dedicated development (initially) centred around them and you don't have to work for $5/hr.