Well, it took me a few read throughs to understand exactly what he wanted.
Brevity and clarity is vital.
I believe there are no more CPL exams. I may be wrong there. Therefore, most people do the ATPL theory. Bear in mind the time limits on them re Instrument ratings. Surf the CAA SRG's website for more info.
It is better to have all the qualifications ready to roll so when you get "tired" of your current job you are in a good position to advance/move.
Some of my friends are doing some hour building in Oz and adding a multi engine endorsement to their licences.
There is nothing wrong with instructing. However, quite often people burn out. Instructing for a good school can be a great start to your career.
For what it is worth, don't get into too much debt.