My school always used Clear-com's. They're not incredibly cheap, but certainly better than a PC. You also don't need to go all out and get a real base station...the portable one does nicely. BenFranske is right that people need to be all over the place, but they don't always have to be connected. We had someone on each side of the stage, the people running the boards, and the stage manager all connected. The stations are wired together, but it shouldn't be hard to find someone to run the XLR for you, or you can just run it through your normal audio snake.
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My school always used Clear-com's. They're not incredibly cheap, but certainly better than a PC. You also don't need to go all out and get a real base station...the portable one does nicely. BenFranske is right that people need to be all over the place, but they don't always have to be connected. We had someone on each side of the stage, the people running the boards, and the stage manager all connected. The stations are wired together, but it shouldn't be hard to find someone to run the XLR for you, or you can just run it through your normal audio snake.