you would make an online order,
That's the part I'd disagree with... no online "orders". The plans for most everything imaginable will be readily available, pre-programmed, open-source, what have you, and you will be able to print them out with no more effort, or cost, than checking your email, aside from the cost of materials.
I must say, 3-D metal printing is astounding.
The whole thing is very Star Trek.
Tea, Earl Grey, Hot.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.