Lets see, assuming you mean Temecula type of city as exurb and assuming such person works 50-60 miles away. 50 miles * 2 (round trip) * 5 (days a week) * 52 weeks = 26000 miles/year (31200 miles/year for 60 miles). If you drive a car that get 40 mpg, not that hard to do, a lot of new small cars gets that much now. We’re talking about 650-780 gallons/year. Even if gas goes up to $10/gal, we’re talking about $6500-7800/year. Do you think another $4-5k/year is going to make those areas less attractive?