Working part-time and doing PhD is no fun at all so unless you have a strong desire to do a PhD, I think it’s a waste of time as the return you are going to get might not worth all the effort you put in.
Want to become a lceturer? You need to publish (in 3 star journals and not those journals your circle of friends created) and on top of that you must bring in “funding” for your department otherwise you will jumping from one institution to another forever …
Worst case the job depends on funding and there is no certainty when the fund will dry up but it will eventually.
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