Tall Bloke.
What I mean is, you're going into aeronautical engineering for the wrong reasons. The first question you're asking is about money. There is no money in engineering, never has been and very likely never will be.
Aircraft engineering pays it's own rewards.
There are few things so satisfying as clearing a snag using your own experience and knowledge of an aircraft or it's systems. 4 years in the City Uni won't give you that experience, nor will 10.
If you're serious about aviation get out on the hangar floor and do some spannering. IF you make it to management in years to come you'll be a better manager for it but don't try to inflict classroom learnt management skills on a workforce that has come up through the ranks. They'll see right through you in a flash.
Taff