ss13:
Many of you long-timers in this forum, might indeed be real specialist about the things in Poland, but for some reason this doesn’t come out in your response (which, frankly, are useless most of the time).
Look mate, if I wanted to be an ars*hole about this, I could have posted to the original poster "I'll help you out and I'll only charge three weeks' rental rather than the standard four", then got a Polish company to rent it out at two weeks' rental and kept the difference for myself. It's not big, it's not clever, but it would be profitable.
However, as you ask nicely, I will ask my friend (or at least, only semi-human I know who works in real estate) about property management and then post back. Will that do you?