You can run multiple storage nodes but preferably, each in a different physical locations.
Each node should use its own signed identity. During the beta, you need to have an authorization token to sign your identity. To receive the authorization token you should subscribe to the waitlist with a different email address.
If you want to run multiple nodes in the same location, you have a few options:
1) use the OS functions to make a RAID array from your disks. Please note that we do not recommend this option, especially the use of RAID without parity. Without parity, a single disk failure would result in the loss of the entire node with all its raided disks. On the other hand, using RAID with parity, you will waste part of the array for the parity configuration.
2) start more nodes, each with its own identity. But this also comes with some [downsides](https://forum.storj.io/t/add-multiple-drive-restart-node-with-different-parameters-and-reduce-storage-with-out-penalty/306/14)
So, considering the disadvantages of options 1) and 2) the best way would be to wait until the first node is filled up, and only then add another new node. This will have the advantage that in this case the vetting process will not take an extended time, as it would if you tried to start multiple nodes at the same time on the same IP/location.
Please, note - running more nodes or adding more space doesn't help you to get more data or traffic. How fast you will be able to fill up your shared space highly depends on customers´actions related to their needs for up and downloading their files.
Since in a single location, all your nodes would be behind the same IP, they will receive the same or less amount of data as you would if you were running only one single node. This is because of IP filtering - we want to create a network that is as decentralized as possible.
It is also important to remember that it is not cost effective to buy any hardware with the sole purpose of using it only for Storj, ROI can take years or you may never recover the entire amount invested at all. This is because this is not mining, space and bandwidth are used by real people, not computers. So, no there will not be a predictable stream of income, and your setup will only be profitable if your hardware would be running and online anyway regardless of your participating in the Storj Network.