>this is always going to cost a LOT more than ground transportation- for fuel costs alone
I don't care. I'm not sure the commute angle is going to be practical in the near future for all the noise, congestion, and safe/available VTOL locations, but I'd sure as shit drop $100k right now if I could by a vehicle that could navigate normal roads/act as a "regular car" and also fly me between general aviation strips with a 250-300 mile range, even if it meant the equivalent of 10-12MPG on road fuel. That's half the range of a little Cessna, and probably similar efficiency (accounting for road fuel cost vs aviation fuel). I live in the middle of nowhere, and cutting my time to destination in half (or better, given none of the roads around me are straight) would be worth it.
Of course, these beasts are more likely to run in the small-jet class, with a starting price in the $2M price range and get the (cost) equivalent of 2-4MPG so my checking account is probably safe for a while.