I'm a little confused about this - you indicated that this failure lost a month of work for you which would indicated this is your primary storage location for your work, but wouldn't it lose all your work, then?
I would guess as others have said that the dock must be using some proprietary configuration for its RAID scheme that makes the disks unreadable by standard connections and devices. I think getting your consultant to supply another dock of the same make and model to attempt data recovery is a reasonable course of action. If it means getting a month of work back, I think it would be worth a shot.
Going forward, it sounds like your drives are fine, and it even sounds like the dock is working fine, but I don't know that I would trust it with important information again. That being said, if you've got (3) 4TB drives and it sounds like you have less than 4TB of data you're well on your way to having a decent backup system with a few modifications. I would personally install one of the drives internally if possible for the fastest access to your data while you're using it. Then get an external enclosure or two (these look decent http://www.newegg.com/Product/Product.a ... 6817173043
) and either swap them out as offsite backups regularly, or my preferred option, use a program like Crashplan to locate one remotely (at home, work, parent/trusted friend's house) and back up daily or even as frequently as every minute if you want to. I use both Windows home server and Crashplan to backup both my data and my installations and I've been able to save a lot of time and data. The idea is that a local backup is going to be quick and protect you against things like hardware failure and data corruption as well as human error with a quick path back to usable data. The idea of offsite is to protect against disaster (fire, flood, theft) and the off chance that your local backup would also be unusable due to hardware failure, corruption, etc.
There are about a million ways to skin the cat of backup and we've discussed it on the forums and front page comments of the site a few times - none of them have to be terribly technical, but there are better options you can use without a large investment (or any) in additional hardware.
Hope you get your data back - that's a terrible feeling.