|otezs you cant address bandwidth utilization with more networks. This approach won't make a different to someone on either network hogs all the bandwidth. Both networks feed from the same trough.|
Consider all you need is this
Keep the extra router as a spare.
Now if you want to do as you desire, two routers off one switch which is off the one internet connection, it can be done.
First thing you consider is the two wan port ip addresses. You say you have those so the modem<>switch<>router(s) setup is correct. Confirm they are getting ips by looking at router status or the wan config page in the router. If not workiing ask your isp what the correct settings are.
Next issue is getting them all in the same network physically and same subnet.
You configure each routers lan access to the same subnet so router1 is 192.168.x.1 and router2 is 192.168.x.2
Disable dhcp serving on both routers.
Manually assign ip to the pcs starting and .3. To load balance the network choose have to be on the 192.168.x.1 for gateway and the other half set to 192.168.x.2
Install a crossover cable from router1 to router2 lan ports. Now you have physical connectivity.
Mission accomplished. All pcs are in the same subnet. They can communicate between routers. They all share the same internet access.
What you could do to address the bandwidth issue is you can put a proxy bandwidth limiter instead of one router and put everyone you want to limit on that router gateway.