Not very hard in principle, but I gather it tends to be rather stressful, with stuff like payments not arriving when they're supposed to happening every now and then. Also, I couldn't avoid the feeling of being a leech, justified or not.
Non-academic think tanks are a possibility, but for Singularity-related matters I can't think of others than the SIAI, and their resources are limited.
Many people would steal food to save lives of the starving, and that's illegal.
Working within the national support system to increase the chance of saving everybody/everything? If you would do the first, you should probably do the second. But you need to weigh the plausibility of the get-rich-and-fund-institute option, including the positive contributions of the others you could potentially hire.
Ideally, I'd like to save the world. One way to do that involves contributing academic research, which raises the question of what's the most effective way of doing that.
The traditional wisdom says if you want to do research, you should get a job in a university. But for the most part the system seems to be set up so that you first spend a long time working for someone else and research their ideas, after which you can lead your own group, but then most of your time will be spent on applying for grants and other administrative trivia rather than actually researching the interesting stuff. Also, in Finland at least, all professors need to also spend time doing teaching, so that's another time sink.
I suspect I would have more time to actually dedicate on research, and I could get doing it quicker, if I took a part-time job and did the research in my spare time. E.g. the recommended rates for a freelance journalist in Finland would allow me to spend a week each month doing work and three weeks doing research, of course assuming that I can pull off the freelance journalism part.
What (dis)advantages does this have compared to the traditional model?
Some advantages:
Some disadvantages:
EDIT: Note that while I certainly do appreciate comments specific to my situation, I posted this over at LW and not Discussion because I was hoping the discussion would also be useful for others who might be considering an academic path. So feel free to also provide commentary that's US-specific, say.