The biggest problem in my youth was not that I spent... it was that I overspent. I'd pay my vacation trips with credit cards instead of cash. I was just digging a big financial hole.
Usually those trips allow you to take two bags for each passenger. Do you need to take two with you for this trip? What if you sell your services as courier for somebody that wants to send gifts to their families in Poland, and tell them you will charge them $200 to take a bag for them. Do the same when coming back. I've seen that done by some friends that do that for latinamerican countries. One of them does that for a living.
Usually those trips allow you to take two bags for each passenger. Do you need to take two with you for this trip? What if you sell your services as courier for somebody that wants to send gifts to their families in Poland, and tell them you will charge them $200 to take a bag for them. Do the same when coming back. I've seen that done by some friends that do that for latinamerican countries. One of them does that for a living.