I've got a budget of £1000, but really I'd like it for less than that. I want to set up a 20TB+ storage system for a project I'm working on that will use roughly 15TB, and the rest for storing photos, music, movies and games. Not all 20TB will be used immediately and I already have some disks, so leave the price of HDDs out of that £1000 budget.
Ideally, I'd like it to be rack-mountable too as I'd like to get a server rack and put all my computers within it (getting rack-mounted cases for my desktop machines too - but that's unrelated).
I've noticed that you can get some affordable mass-storage systems, but as soon as they're rack-mounted, the price goes up 100x. Is there a reason for this other than that you can sting a business more than you can a home user, and rack-mounted would usually be used by business?
Regardless, that's what I want to do. Is it possible or totally unrealistic? I have limited experience setting such up, so links to tutorials, any advice, etc, would be great.
The plan is for the storage system be accessed by another server (not included in the budget) probably running FreeBSD, though other free OSes are welcome (I only have experience with FreeBSD and Linux, though).