Life / Moving to Poland - how to go about it? [6]

I want to move to Poland but have'nt got a clue as how to go about it. I have lived for several years in poland at the beginning of the 90's but worked in germany/holland so not officially a resident. My wife is polish but sadly does not, will not return there to live, which I find absolutely outrageous as had went to all the bother to learn polish and going there in the early years to establish myself and settle but managed to get into a relationship with somebody who only had it in their head to get out of the country and of course me being the free ticket out and the wallet holder. I own jointly with my wife a smallholding of 2 hectacres and house/outbuildings I want to return as self employed and develop a small but lucrative horticultural/agricultural business. I will be self employed but actually won't have an income from it untill at least late summer and then as in this field dependant on weather conditions and such. How do I stand with Immigration over the income? (I am actually a British Citizen resident in Holland, with two children both Brit/Polish passport holders)

The Area I want to move to is near Glubczyce, which is wojewodstwa Opolskie. I am also skilled in building work (had own company in NL, prior to recession) Car mechanics/bodywork repairs and speak reasonably good dutch,polish and german.

Any advice is more than welcome and if the post seems a little confused that's because I am but sure through conversation we can figure out a solution.