1)What are the chances that i can freelance on the Karta Pobytu
as far as I know you have to be employed by someone to get a Karta Pobytu (residence card) if you are not a EU-citizen (or be a spouse of someone who is Polish or allowed residence in Poland
- some countries allow residence for investors bringing in money to the host country but a quick search in Polish didn't find any such method for Poland -
edit: one source actually quotes that residence can be granted to a person who wants to run business in Poland but it didn't state any details
found a webpage with a little more details but I'm too lazy to translate it right now: udsc.gov.pl/cudzoziemcy/obywatele-panstw-trzecich/chce-przedluzyc-swoj-pobyt-w-polsce/zezwolenie-na-pobyt-czasowy/dzialalnosc-gospodarcza/