okay so, I just opened up two shops in my hometown.

The two stores is about 6 blocks apart, connecting them by wire is not really feasible in cost wise. What kind of network topology should I use for my small shops, there will be 5 computers, one is the sales computer ,another 4 as mentioned is the guest computer. I want the sales and guest computers network to be seperated. Both shops have same computers.

The guest computers serves up simple website that has my shop catalog on it, I'm thinking of using a web server.

So, how am i suppose to setup these networks, im planning to add in more computers in the future. Is it I need to station a single server at a shop, and all the computer connected to it? or is there any more effective methods?

I'm no networking expert, would love to hear some advice.