I'll sell you one for 0.12 BTC + shipping and walk you through setting it up.
I see people using these hubs and stuff, for multiple ones. How hard is it if I bought like 9 of them, and hooked them up to run 24/7? Will it work on an old computer? And how much startup costs? I have the computer, thats all.
You'll need a fan if you have that many. And you have to get a hub with enough power for them, like an Anker hub. You should just start with one and see if you like it.