it's literally just up to your ability and nothing else
Read the greatest kung fu manual ever written, "Five Lessons" by Ben Hogan, or use some other book. I met one kid that modeled his swing off of YouTube videos and with that got himself to a scratch handicap.
The real cost is time.
$3300 is not in any way "cheap" for the majority of Americans.
I like HN, but it's disheartening how many of my peers in tech seem to think that a West Coast programmer's salary is normal.
That is not a lot to live on. And, since we're talking about the median, 50% of the earning population are going to be left with even less than that.
Hmm. You could say much the same about tennis, surely?
I suspect the biggest cost at the top level is coaching time: Is it possible to get good enough to match the elite players without access to a coach who is good enough to train players at that level?