Ideally, I'd try to talk to people who made similar decisions (e.g. Turkish migrating to Portugal or similar) so you can perhaps add new information to your options.
Regarding the financial weight: this money is lost already, so shouldn't be taken into account for the decision.
Living abroad is aways a valuable experience. On the other hand, if you have a low income and little opportunity for growth, this can be a frustrating on the medium term. If you go that path, maybe try to think ahead to see what will be your next step. Suppose you don't like Portugal, could you fall back to your option B after 2 years?