To be honest, I think 65 years is optimistic given the current state of things. I want to know what energy source can support a society hurling millions of averages Joe's into space. If its nuclear, then sufficient capacity probably won't be ready in 65 years. If its fossil fuels - LMAO. If its renewables, have fun with subsistence agriculture and stop dreaming of space because you will never go there.

I also have a high degree of scepticism about the whole space tourist industry. I've just seen pictures of where Scaled Composites are building their newest space ship, and I can't say I'm exactly reassured about the quality of work they are doing.

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"I worry that, especially as the Millennium edges nearer, pseudo-science and superstition will seem year by year more tempting, the siren song of unreason more sonorous and attractive." - Carl Sagan, 1995