ReadyNAS Vault : great but overpriced!

I just purchased a 250gb encrypted stand alone usb drive. My plan is to take the 75gb+ (and growing ever larger) section of my duo that is critical to us (pictures / music / various other backup folders), throw a copy of it all onto that drive, and store it off site someplace. My plan is to update it about every quarter year, which will be fine for us.

This is where I believe Netgear could really shine- they could offer the 'vault' type service to their ever growing homeowner/home user market more inexpensively if you agreed to only update the backup 4-8 times/yr (which would reduce the bandwidth needs and would ensure that they are not cannibalizing their buisness customer accounts). Sadly, they continue to price that service as though we are all business customers and need to backup every day or every week.