Section 6. The total costs of the land including interest at the rate of six percent (6%) per annum with a two percent (2%) rebate for amortizations paid on time, shall be paid by the farmer-beneficiary or his heirs to the Land Bank over a period of up to twenty (20) years in twenty (20) equal annual amortizations. Lands already valued and financed by the Land Bank are likewise extended a 20-year period of payment of twenty (20) equal annual amortizations. However, the farmer-beneficiary if he so elects, may pay in full before the twentieth year or may request the Land Bank to structure a repayment period of less than twenty (20) years if the amount to be financed and the corresponding annual obligations are well within the farmer's capacity to meet. Ownership of lands acquired by the farmer-beneficiary may be transferred after full payment of amortizations.