Wow, that's crazy. What I found most interesting was the teaching method that has him starting at the hole and working outward, exclusively. It would seem to me that so many shots are based off the same swing that I'd want a sound swing to be my foundation.
Observations:
1) The "10,000 Hour Rule" is in vogue, but Gladwell's comments also mentioned that maybe the true gift is finding someone that wants to put in that kind of time. Bill Joy, Bill Gates, the Beatles, concert musicians. Doesn't sound like this guy likes golf, so how passion-filled can those practice hours be?
2) Art and business are not sport. Guys like Joy and Gates weren't competing in a zero-sum I-win-you-lose game. They were possibly competing, but it was to expand the frontier. The Beatles were artists. Golf? This guy, to play professionally, doesn't just need to master proficiency. He needs to have a cut-your-heart-out mindset like Lanny Wadkins, Curtis Strange, David Toms, or Tiger Woods to be successful. (Those are names an actual Tour pro told me were super-competitive and would run you over in the parking lot they wanted to win so badly.)
3) A Microsoft retiree, I think Chris Peters, tried this but with bowling. (He now owns the PBA I think.) The article made a trace reference to it, but there is a huge problem with putting your 10,000 hours in at such an older age. A thousand a year for 10 years from age 11 to 20 would be better. Not to mention, physically his body could break down when he starts working on the full swing.
4) Muscle memory is made easier with the presence of a thick myelin sheath. As I understand it, your body fires electricity to signal the muscles. An uncoordinated guy does nothave a fast current. By repeating something - piano, shooting free throws, swingng a golf club - the body forms a layer of insulation to coat the nerve. This myelin sheath can be built up with thousands of hours of practice as a kid. Hopefully this guy was working on a similar hobby at that age.
Best of luck. It'd be a great story if he plays even the minitours.