One of the advantages of balloon loan programs is that they tend to have the lower interest rate and therefore lower mortgage payments for the balloon period. Broward County's Homebuyer Purchase Assistance (HPA) is a deferred payment loan at.A balloon loan is usually rather short, with a term of three to five years, but the payment is based on a term of up to 15 years. This tool figures a loan's monthly and balloon payments, based on the amount borrowed, the loan term and the annual interest rate. Interest rates are locked at loan approval after a property is identified and under contract. TERMS. Up to 30-year fixed rate.