I am not saying that no doctors are living in big expensive neighborhoods. I am saying that the majority of them are living in normal homes, and have normal lives. These changes would impact normal general practitioners the hardest.
You seem to live with the fallacious belief that Obamacare will only reduce the payments to the doctors by 10%, and that everyone will be covered under the new ACA. That couldn't be farther from the truth.
Obama kept mentioning that 47 million did not have health insurance in the US. The CBO estimates that 30 million will STILL NOT be uninsured under Obamacare.
The CBO estimates that between 7 million to 20 million will lose their existing coverage due to Obamacare incentives.
In February, CBO reported that “in 2019 [5 years after Obamacare is implemented], an estimated 12 million people who would have had an offer of employment-based coverage under prior law will lose their offer under current law [aka ‘Obamacare’].” - FORBES
Here is someone else who makes the same points that I make : Look Out Below, The Obamacare Chaos Is Coming - Forbes