Be careful interpreting some responses. Remember that you are talking to the converted here. Our answers to your questions regarding setting up a printing service would be skewed because most of us have our own printers, so would not necessarily use the services of someone else.

3D printing will be more commonly used by people who are teenagers like you. Old folks of my generation are not likely to adopt it. We have enough trouble attaching a photo to a text message!

Old Man Emu