It would be cheaper to have a router than two modems/two internet connections. However, you could certinally do that, even though a network... But, the best option is a router. Wireless would do just fine, but just make sure you don't have much interference to mess up the signal...
__________________
Desktop * Athlon X2 4200 | 2G RAM | 160G HD | 7600GT
Laptop1 * C2D T5550 | 3G RAM | 120G HD | Intel x3100
Laptop2 * C2D T5250 | 2G RAM | 160G HD | Intel x3100
|