Quite frankly, I find it fascinating that so many people hope to find "nobility" in their ancestry.
You thinking in terms of English nobility - money wise.
In Poland nobility was term extended to about 10% of the population not necessary landed or rich.
For a sake of better understanding instead of nobility or feudal, one should think in term of citizenship, Polish noble it first of all citizen of his country with rights and privileges unlike the others residents of Polish Kingdom!
Citizen not unlike Roman Citizen in the Roman Empire.
Nobility in English or French was called in Poland - magnate, lord or aristocracy!
They were indeed money wise - pity it was lost.