$500m would be more than sufficient to do all of those things you've outlined. If you can put up 25% (random percent) of the money then you'd be able to get investors to put in the rest. Only a nut would invest the entire amount themselves.
But that aside, we're talking here about quality of life which does not equal being able to pay for the craziest most expensive ideas that you can come up with.
But that aside, we're talking here about quality of life which does not equal being able to pay for the craziest most expensive ideas that you can come up with.