The county commissioners in counties of the second class shall, at the cost of the county, provide for and pay the compensation of such deputies, assistants, and clerks appointed by the county treasurer for the collection of delinquent taxes as hereinabove provided, and shall also furnish the county treasurer, at the cost of the county, with office space, office furniture, equipment, supplies, books of record, stationery, postage, and pay all other necessary expense in connection with the collection of such delinquent county taxes.