(6) To establish and operate a central relocation office which shall perform such functions and activities as may be necessary and proper for the satisfactory relocation of families, individuals, businesses, and nonprofit organizations, incorporated and unincorporated, displaced by any governmental action to decent, safe, and sanitary locations at rents and prices within the financial means of the displaced families, individuals, businesses, and nonprofit organizations. To the extent that special funds are made available by the State or the county, the agency may authorize the central relocation office to make relocation payments for actual moving costs to families, individuals, businesses, and nonprofit organizations, incorporated or unincorporated, displaced from other than urban renewal projects; provided that the payments shall not exceed $100 for each displaced family or individual and $300 for each displaced business (including the operation of a farm) or nonprofit organization; provided further that the payments shall not be made to recipients of any other relocation payments made by any government or agency thereof for the same displacement. In the case of a business, the allowable expenses for transportation shall not exceed the cost of moving fifty miles from the point from which the business is being displaced. To prepare plans for and assist in the relocation of persons (including individuals, families, business concerns, nonprofit organizations and others) displaced from an urban renewal area, and to make relocation payments to or with respect to the persons from funds provided by the federal government.