Put a patch panel in the structured media center, attach all house Cat-5++ cables to it. Put in-wall keystone RJ-45 receptacles at the other end of each cable.

Put a patch panel in the structured media center, attach all house Cat-5++ cables to it. Put in-wall keystone RJ-45 receptacles at the other end of each cable. Put ISP router/gateway/wifi box at some central location. Use patch cables and panel to connect ISP box to ISP. Add WAPs elsewhere as needed.