"Anyone have an idea what one of the duplex meter bases cost??"
They're expensive. Around here we just use two meter combos side by side for overhead. One rigid riser to support the drop and one smaller EMT riser for the second. The POCO splices them together at the weatherhead as long as they are no more than 18 inches apart. I can buy two 100 amp combos, the riser, the extra 1" EMT riser and weatherhead, the extra #4cu,& the extra hub for under $200.
