There are a lot of posts about off-loading P2 cards to a hard drive. With a MBPro, FW800 mirrored RAID drive and Duel adaptor we can offload with Shotput P2 a 16GB card without verification in about 8 minutes and 12 minutes with. If you have a dedicated person to do those transfers, that could work. Although, you might want to rent two more cards to give you some breathing room. After the cards are transferred AND verified, you can format them and plug them back into the 500 and keep rotating cards.
Just be sure to verify each offload. We actually play a few seconds of each offloaded clip with HD Log even after Shotput verifies. If you do something wrong you’ve lost your footage.
John
MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.5 QT7.5.5 Kona 3 Dual Cinema 23 ATI Radeon HD 3870
ATTO ExpressSAS R380 RAID Adapter, PDE Enclosure with 8-drive 6TB RAID 5
24″ TV-Logic Monitor
Final Cut Studio 2 (up to date)
Pro Tools HD w SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN