I think it is an older saying but I don't know who said it first. The version I heard was from scientist and the rule is to first buy the cheapest tool that doe

I think it is an older saying but I don't know who said it first. The version I heard was from scientist and the rule is to first buy the cheapest tool that does the job, then when you need something better, buy the best that you can afford. For soldiering, I'm still at the first stage.