In the past I've used a dehydrator. Although I'm going to try the oven the next time I can think to pick up some beef.
Jerky 1
jerky 2
Just as a comparison...store bought jerky is at LEAST 7 bucks a pound...sometimes up to 16 depending on what size\brand. Beef roast is mabey 2.50 a lbs give or take a little...minus spices and whatnot you're still looking at well over a 50% savings.