Will I save money?

If I buy the meat and seasonings and make my own, will I save money from buying basic jerky from the store, or is it you don't really save money you just get to make it exactly how you want it? Assuming it is beef jerky buying a low-priced cut and going from there? Like if I buy 4 lbs of meat, how much will it be after it's all dehydrated and such? Thanks in advance for any answers!