Advice for a DIY fruit cage?

Hi all,

We're experiencing the exciting phenomenon of growing more fruit on our new plot and having most of it eaten by birds...I'm considering the value of building a walk-in-height fruit cage for next year. It feels like something we could do with some chunky posts and chicken wire, but perhaps I am being overly optimistic/simplistic. Does anyone have any advice or experience of building a <ahem> very cheap <ahem> fruit cage that was worth the effort in protecting your produce and not too much of a pain to deal with for weeding/harvesting?

We're pretty low-tech with tools, though we do have a circular saw. The soil is pretty heavy, but I reckon we could work with it when it's as wet as it is at the moment.

Thanks!