Axiom

I am on a budget and I need a new rear wheel. Clearly the stock rear wheel that comes with the Trek 1.2 can't handle my 270lbs so I need something sturdy. I'd like one that is strong enough that it can take a bit of a beating since I use the 1.2 as a commuter and trainer bike. Weight isn't really an issue since I am not a "weight weenie" but price is. The LBS told me their cheapest wheel would cost $105 and they are machine built, and a hand built wheel would cost $250, which I cannot afford right now. Any recommendations? I *might* purchase a front wheel as well, but I am not sure.

Thanks!