but I wouldn't be able to cover my debts back here with the income.
That's a problem and it remains a problem if you were to get, say a FI job locally. The catch 22 is that a low paid starter job will never cover the debts but the experience will probably ease your progress into a better paid job sooner.
It has to be seen as part of the training process. Having some real world flying is often seen as an advantage in interviews.
It's a dilemma for the newly qualified.