What say you?Yes it is a good plan, no it is not, I'm an idiot, the usual.
Well, you're in Krakow, can't you gauge the local market better than most of us? I'm not being sarcastic, just sayin'.
It sounds like you have good business and organisational ability, summarise well and probably would be great at proofreading and so forth, in fact someone might even contact you via the forum and ask you to do some proofreading for them, you never know. But that said, my pure guess is that Krakow has attracted a larger than average number of English-speaking professionals and the market might already be saturated. There are certainly plenty begging for work here in Wro, just check Gumtree etc.
It might be a case of right place, right time, and a lucky break, but until that point if it comes I'm sure you are well aware it would not to be wise to give up the day job, as it were.