– Calculate your balloon payments and determine if this is the best type of loan for you. Ask Arvest. Rates. May Go Down in Value Investment products and services provided by Arvest Investments, Inc., doing business as Arvest Wealth Management, member FINRA/SIPC, an home loan payment calculator. To use the Mobile Home Loan Calculator below, just enter the appropriate values into the fields below (or use the default values provided), and click the "Calculate" button. Try different interest rates and term lengths to find the right monthly payment for you.