Combining router and software to double WAN speed

Hi guys,

I was wondering if it was possible to combine two cable DSL connections (as in load balancing) using a program like Dispatch from Connectify and using a router from TP-Link (multi-WAN / Fail over switch)? What do I need? I have a server running 24/7 where I could install whatever I need (like a gateway for example). The server has 2 Ethernet ports but I guess I'll need to install a 3rd Ethernet port rigth? How would you do it?

The ideas that come to my mind are:

1.

Both connections leave the router and go into the server using 2 Ethernet ports > Dispatch bonds them > a single connection leaves the server through a 3rd Ethernet port and go into a 3rd WAN port at the router > all my network continues to connect to the router (thru another switch) for networking/internet access

2.

Both connections leave the router and go into the server using 2 Ethernet ports > Dispatch bonds them > a single connection leaves the server through a 3rd Ethernet port and go into the second (24-port) switch > Dispatch (or other gateway software) handle all the permissions/firewall/etc for the network

3.

I take the router out of the picture > go from my 2 modems straight to my server > Dispatch combines/bonds my connections > another gateway-alike software manages my network (firewall, DHCP, etc) > connect to my switch using a 3rd Ethernet port from my server
Please keep in mind that I'm very rusty when it comes to networking.

In my head I will always have to install a 3rd Ethernet port into my server. Is there any other choice? Of course I would love to purchase a 380 router from Peplink but is not possible in my Country so I have to make up something like this so I can fully enjoy my 2 x 12 Mbps connections.

Please keep in mind that even I don't know a lot besides working in Windows enviroments, my server is running under VMWare Sphere so I can open a new dedicated server of whichever OS to run this.

Any ideas will be very appreciated.

Thanks in advance!