Too long to read.

My opinion, your first option for UK is not worth it.

UK economy, not very healthy at the moment, and the near future. Europe economy is even worst.

Weekly wage of £600 for a economy graduates is over-rated. That is more of a employee with good career pathway of 5-10 years working experience.

Being international student and at such a competitive job field, it is very hard to get a job.

Political unstable at the moment, probably unfavourable of immigrant.

My point is, not worth the risk of having such a debt without the security of having a job when you graduated.