Create you own broadband network. Did you know you can connect the WAN port of a broadband router to the another? Its too simple...........  domestic solution...........
 
(  INTERNET on
WIRELESS Eth port )
            !
            !
            !             Port1LAN         ETH Port
            !!!!!!!!!!!!!!!!!!!!!!!!                      !!!!!!!!!!!!!!!!!!!!!!!!
  ETH    ! WAN        !----------------------! Client 1    !
  PORT  ! Router      ! -----               !ROUTER   !-------------------CLIENT1 LAN ( private ips )
            !!!!!!!!!!!!!!!!!!!!!!!        !               !!!!!!!!!!!!!!!!!!!!!!!
                    Port2 LAN  !
                                     !
                                     !-------------!!!!!!!!!!!!!!!!!!!!!!!!!
                                                  ! Client 2     !------------------CLIENT2 LAN ( private ips )
                                                  ! Router      !
                                                  !!!!!!!!!!!!!!!!!!!!!!!!!
 
  Subnet addressing :
 
On WAN Router
Public ethernet port 41.0.0.1 etc
Public ethernet ports ( LAN side ) subnet 41.1.0.1 to 41.1.0.4 etc
 
On Client 1 Router
Public ethernet port port ( pick 1 ip address from Wan router lan ip block 41.1.0.1 )
 
On Client 2 Router
Public ethernet port port ( pick 1 ip address from Wan router lan ip block  41.1.0.2 )
 
Simply remember WAN router can allow stub networks and allow static/dynamic routing.
 
Enjoy. :-)