You must buy your way - best equipment is a must!
It takes a long time of playing to arrive at the neccessary levels, with inferior equipment to buy and a lot of balls being used up. Then you buy that top notch equipment which has become incredibly expensive compared to former times. Of course you need the best balls to contend, using them up in endless trials. And, you may seek help in the new "Focus boost", slowing down the meter for 30 cr a pop.
When the first 49 was accomplished a few years ago, it took the player 33 hours of gameplay. Go figure about the costs!
And, apparently, there are not-so-legal means to better the game, but any talk about these is barred by the Guidelines.
About crazy scores, it's but a computer game, much easier to handle with small handmovements + mouseclicks than four days on the real courses, and with certain limitation in making it difficult.