I have commercial (ie high priority), 600Mbit/120Mbit broadband with extremely stable (under 15ms, over 99% of th time) round trip to most of the Poland, for equivalent of 20 USD per month.
I know its not the same everywhere in Poland, but consider I also have three mobile internet plans. One of them is 4G limited to 20Mbit but unlimited monthly transfer, for 5 USD per month. This is also quite stable and allows me to comfortably work remotely from almost every place in Poland and serves me as a backup link.