I know this comment too will get downvoted but I find it weird that a genuine question is getting downvotes. To my knowledge the whole thing is made up of desig

I know this comment too will get downvoted but I find it weird that a genuine question is getting downvotes. To my knowledge the whole thing is made up of design and actual physical things. Designs can be open sourced, right? So how much do these things actually cost to obtain?