Be ready to take a HUGE Pay cut.
It's not the pay cut that hurts so much as the even HUGER cut in savings potential. An engineer with only $100,000 in the bank at age 52 has to start thinking seriously about saving up for retirement, and he won't be able to do that in Poland, UNLESS he gets sent to Poland by an American company and is paid American wages. Otherwise, the opportunity cost is so high that moving back to Poland is essentially a pipe dream.
Another possibility is to sign up for a five-year contract in the Gulf or in the oil fields somewhere, and then retire early.