Actually setting up a network isn't that hard,getting it to work can be a struggle. :-)
Wireless tech might have advanced loads,but a look thru PCA's pages will show that the signal can be a pig,adsl slowdowns,dropped connections,etc.
I was going to get a wireless router with built-in modem,but had a good think about it,and decided a standard cabled network(which I already have)was good enough.It has run continuously now for several years,with the only hitch being caused by the carpet fitters who sliced thru the cable whilst laying the stair carpet. :-)