@Julie4107 Guest service fees are anywhere from about 14.5-20%.
If a guest started out asking you for a discount, that is a big red flag. You should not agree to guests' requests for discounts. Discount seekers almost always turn out to be problematic in other ways.
And be careful with month long bookings. I don't know the landlord/tenant laws where you live, but in most jurisdictions a gueest who stays 30 days or more becomes a tenant under the eyes of the law and if they turn out to be objectionable, you could have a hard time getting them out.