Its definately worth getting your ticket!!
That all depends on where you get work, but as a rough guide about 20k to 25k depending on how shifts work etc etc. As you work your way up the ladder the money doesnt start to become anywhere near good until you are licensed, then as a permie expect around 40k as a B1 and 45 as a B2.
Depending on what types you get will determine where you can and cannot go, but generally speaking there are always openings of some form or other.
As a foot note if you are considering doing both B1 and B2 it takes less exams to go from B1 to B2 than the other way round and passing the exams is the easy part! Getting experience which is worth while isn't easy and then getting the CAA to accept it can be even harder! As many people will tell you, its not just what you know but who you know in this industry.