You need to decide what you want to do, then read the specs on the devices you are planning to do it with, and ensure that they meet your requirement. You need to plan in expansion capability if your needs change. The solution you suggest above might work, but without doing the homework on it, I can't say one way or another, although experience is inclined to suggest that it wouldn't work or at least not very well. It seems a clumsy way of doing it.