A board of county commissioners may by resolution provide property owners the option of making prepayments of property taxes in ten monthly payments beginning June 1 of the year in which the tax bill is prepared and ending March 1 of the following year. The first nine monthly payments shall each be in an amount equal to ten percent of the prior year’s property tax bill and the final payment on March 1 shall be in an amount equal to the balance of the tax due, as indicated on the tax bill prepared and mailed pursuant to Sections 7-38-36 and 7-38-37 N.M. Stat. Ann.; provided that an option otherwise allowed pursuant to this section may not be exercised if taxes are escrowed for the property owner and included in the property owner’s monthly mortgage payment.