I think its more of a matter of goals and your willingness to achieve it.

Going to Higher Nitec won't guarentee that you get a 3k /month job. Some University graduates don't even get offered a 3k /month job.

If you want a house and a car, plan what kind of house and car you want. This gives you a gauge of your goal of how much you will need to earn and how long to achieve it.

If 3k is not sufficient, earn more. If it is, then live and be happy with life.

For career-wise, the world is harsh. Usually what we want to do doesn't earn enough to make ends meet. We end up doing what we don't like for money. So my guess is that you will be no exception from the majority. Please don't be offended.

Just my 2 cents worth. Hope you can make it in life.
cheers!
(from someone who's still discovering life too)