The problem is, if I was doing the same thing as you, I could not afford the copper - so I would likely have to do something else. You can make clay pipes (obviously not to plump your home lol), to pipe from a natural water source to your home - they are not that hard to make, and they last a long time - people in some places are still using the ones made by the Romans. Here is one of my favorite doco series talking about clay pipes in the 50s: https://www.dailymotion.com/video/xnlzf8 - I used to work with clay alot, and although clay pipes are not as robust as plastic / copper - it is a cheaper / natural alternative that everyone has forgotten about - considering you can just look around for clay and it dig it out yourself. The best thing about clay is its not toxic, in fact, some people even eat a bit of it a day for their minerals.
Thanks!