If it is sorted out with the shop owner...then go for it while you wait for your own number
When you go buy a router ...try buying one with wirelss,then you can try out the wireless and if that don't work you can stick the cat5e cable in the back of the router and run it to your house....I would go for a Linksys router they make pretty good stuff and are fair easy to setup......
Back on work we use a linksys router from getting internet from tha charterers office down to the ship.....we use a linksys and it pretty stable need to be restarted now then thats all....only make sure if you use the wireless option both antennas will have to be in line of sight.....oh and don't forget to secure your network...
Claus