[CentOS] Extending Network - OT

Thanks for suggestions, have been very useful

I would select:
1. Pay for a network engineer.
2. Pay for new routers and make a more complex design for departments.
3.
> just specify your network to be bigger than that. For example
> 192.168.0.0-192.168.1.255 gives you 510 hosts
> 192.168.0.0/23

router-------PC with 2NICS--------Institute LAN
      real IP                   192.168.0.0-192.168.1.255
                                   192.168.0.0/23

Is supernetting available this way or can be used only between routers?

Actually I am with the third, because of financial issues.