Down the track, I'd buy a place on http://aboardtheworld.com/ and just network with others of your ilk. They'll have faced the same challenges and could offer some good advice I'd suspect.

Otherwise, what are you interested in beyond AI? I see AI as interesting, but a means to an end. Gardening, for instance, interests me. I would look at ways of improving crop yield, rehab'ing land etc (perhaps naively), or anything with a quantifiable goal. The current wealth imbalance of the world interests me, I'd research ways of coming to terms with that or fixing it :p