My computers are also configured as Staffan's, because no.1 is always on.
At my parents house, there's no computer which is always on so I build a network there. Each computer is connected to a router with switch, the router has the ISP
settings and is always on and connected.
A router is a good solution to your problem. I don't think they're expensive, at least not in The Netherlands (less than 100euro), but I don't know about this in India. I advice you to search for a router with build in switch...