Frame relay is thus a fairly economic choice.
For the past three years, we have been using frame relay for all connections. Thus the office had three PVCs and the router had subinterfaces and routing table entries to handle IP addresses that were destined for either of the homes. What changed is that we moved our office from Frisco to Dillon. As luck would have it, our new Dillon office has lines of sight to each partner's home. So we considered a wireless solution for the links to the two homes.