In the first place - if you are that good... - the respective uni would wan to hold you down for their PHD program and or might even offer you scholarship so that they would tied you down for a couple of years in their uni.

No offences - if you do your studies in your school days - it might not be the case for your uni or beyond - why? - cause you are really competing with the eiltes in studies .

When you ask how well they paid - it is a relative word - you could see alot of people here boasting how well they earn and etc. but actual fact no one knows. it had to be in line with the living standard.

Example - 10 ~ 20 years back - earning 10K p/m would allow you to own a couple of houses and etc. but now?
Hope that would answer your question.
Follow your heart - Being a Prof - do not pay that bad as i can say. but the number of years spend to being a Prof while other peers of yours like in banking and etc. would not be able to compare.
teaching is a passion