Cost. The monthly rent payment, including utility allowances, charged for a rental affordable unit shall not exceed an amount equal to 30% of the maximum monthly income of an eligible household. The monthly housing costs for an ownership affordable unit (inclusive of principal, interest, private mortgage insurance, hazard insurance, real estate taxes, and condominium fees) shall not exceed 38% of monthly income for a household earning 70% of area median income, adjusted for household size. The terms of the loan, the amount of the down payment, and interest rates are taken into consideration in setting the precise income requirements for each for-sale affordable unit. After the initial lottery to sell the unit, ownership affordable units shall be offered at a price no less than 5% below the maximum allowable sales price to allow for an adequate number of potential buyers that may qualify for the unit, though the seller is permitted to sell to the highest qualified bidder for the units.