Biggest dilemma in my life, what would you do ???

I would take that opportunity! If it doesn't work out, you can just quit right? Obviously not as simple as that but somehow your work will be, in the end, terminated?

Having already made the mistake of agreeing to work more than I can handle once before, I'd probably calculate my total workload in advance.

I work 6 days a week right now, that's 54 hours in total (commuting not included) and while I know many consider this to be average at best, I just feel completely drained all the time. Never again.

As Minkah mentioned, calculate your total workload before considering taking this opportunity.

Sometimes it's worth it, some it's not.

Take how much your body can handle in consideration.

Burnout is sick.