That site highlights the reality that Mankind and Earth have had 4 billion years to adapt to each other. I doubt in the near term Mankind can "make it" anywhere else except in very heavily supported groups. Those will always be dependent on Earth.

Nano-technology might be able to make all the fabrics, glues, medicines, chemicals, water, oxygen, metals, spare parts, etc. and so on ad infinitum. If that technology proved amenable there are possibilities.

There may come ways to control and combine nano-technologies to make almost anything, much as letters make words, and words wind up in conjunction meaning more than any individual unit.

I don't know that's impossible given the explosive growth of technology due to the cheapness of computing power and digital memory.

Arf