Airplay without wifi network
I'm planning to buy the new ipad (3G version). I do not wish to subscribe to any additional internet connection other than the one at my ipad. I do not have any wi-fi setup at my home.
Is there a way whereby I can
a. airplay stuff (videos/music/Pics) from my ipad and laptop (windows) to apple TV?
b. stream videos/music from the net through my ipad 3G connection and airplay the same to apple TV/airplay speakers?
Would an airport express help? Any input would be highly appreciated.
Thanks in advance...