No, it's just your imagination that's limited. This is a good idea to test on Mars. Want crazier stuff? Google Venus blimps, or go and find papers about flying supersonic aircraft on Mars.
> I can't stop thinking about what archaeologists will think about us in a thousand years, they will struggle so much to even come up with plausible theories, much less agree on them.
I guess you're implying we should be spending that money on Hepatitis C, to which I'll answer "no, we shouldn't", as money spent on space is pretty useful there on the margin, so you should look for sources of money elsewhere, where there's just too much of it. And if anything, archaeologists will think we've been dumb to put such absurd amounts of wealth to stupid zero sum games and entertainment, instead medical research, space exploration, and basic sciences. But that's just my guess :).
In other news, Hepatitis C is making a big comeback here in Denver. It's the sort of disease we used to laugh about being a "third world" problem back in the day. We don't use the term "third world" anymore, but we are becoming one nonetheless.
I can't stop thinking about what archaeologists will think about us in a thousand years, they will struggle so much to even come up with plausible theories, much less agree on them.