Before approval by the Planning Board of a site plan showing two or more buildings containing multiple dwelling units or a manufactured home park as defined in this chapter, such site plan shall also show, in proper cases or when required by the Planning Board, a park or parks suitably located for playground or other recreational purposes. If the Planning Board determines that a suitable park or parks of adequate size cannot be properly located on any such site plan or is otherwise not practical, the Board may require as a condition of approval of any such site plan a payment to the Town of a sum established in the current schedule of fees adopted by the Town Board, which sum shall be paid by the applicant to the Town Recreation Trust Fund prior to the Planning Board's approval of such site plan, which sum shall constitute a trust fund to be used by the Town exclusively for neighborhood park, playground or recreation purposes, including the acquisition of property.