One pipe out is pretty easy then, I can handle that.

A shipping container I have thought of, I didn't want to build with one but it might come in handy, plus I never thought of making a kiln with one.

Is anyone familiar with geothermal? I plan on starting out with a wood stove outside with floor heating inside and see what kind of strings I have to pull to get a wood stove inside also. Would it be easy to tie in geothermal to the pipe running hot water from the stove?