Lots of depends on the player and his strategy. It is possible to win fast but it is difficult to avoid gambling the rest year. The same time it is difficult to make 3-5 bets per week with small risk and small win. Every week.
It is easy enough goal but not for common gambler. The same time - you don`t get any prize for reaching the goal, so you want to increase the prize. As the result it increase the risk of losing.
That's true, though it's difficult to control your emotion when you are already inside and already enjoying your sessions maybe there are some who can manage but most likely gamblers wanted to take a shortcut, big risk with big earnings instead of staying with your strategy and patiently waiting with small target.
It's tough but doable if you have that good balance on both money and the time that you'll going to spent with strategy that you'll going to follow.
I dont`t think that it would be easy to common gambler. Cmon, it wouldn`t be easy to everybody - you have no prize for the result.

If you need only reach such sum - it is easy, but if you have to have it after a year - it would become a problem.
PS. But professionals can do it easily, i think. Sport betting allows you to increase winrate due to high quality analyze. Several my mates did it easily without any purpose and with the less starting sum.