Hi Bob,
When installed in 2009, total installed cost was around $15,000 (Australian Dollars). That was trading in the new Lewmar winches that came on the boat. The powered winches are Hutton Arco St series, I do not have the sizes to hand but Allen Hutton would be more than happy to oblige with a quotation.
I personally sourced the hydraulic hose and fittings from a local (Adelaide) company and had the switch plates made up. The wiring is all relays and push button contacts which need TLC to help them in the marine environment. If i was building the system again today I would probably use solid state switches and a CANbus control system.
Cheers
Mark