Is it permissible to work in grape harvesting if the grapes will be used for wine production, especially given the urgent need for money to pay for registration fees and room expenses as a university student orphaned of both parents?

It is not permissible to work in harvesting grapes intended for winemaking because that constitutes cooperation in sin and transgression. The Messenger of Allah, peace and blessings be upon him, cursed the one who presses wine and the one for whom it is pressed. One must seek permissible work, and if no other work is available except this, then it is permissible only to the extent of necessity that cannot be repelled except by it.