You won't need another anything. Just the pipe from the well to the new house. Use large enough pipe to eradicate any friction loss and your good to go. You might want to look into a Cycle Stop Valve though. That would make things a lot smoother.
Why a two horse pump? Is the well real deep with a low water level? Were you thinking you would need that big of a pump for two houses?
The only reason I can think that you might need another tank is to keep the pump from cycling too much with that large of a pump if the well is relatively shallow. The CSV will take care of that problem too.