Law /
Poland's green card for American, and citizenship question [16]
You can open a llc company called spooka zoo here and conduct business here make sure u pay taxes and apply for temporary residence for 1 or 2 years and keep doing that for 5 years( I'm not sure if law changed to 3 yrs) and apply for permanent residence then citizenship.
Regarding marriage you will have to get a letter from states that u were never married before so better take girl to states on k1( fiancée visa) get married then come back will be swifter and done in 3 yrs if all is not a fake marriage