this is not so large that you would buy machinery for.
This is true to an extent, as many farmers will have some machines on their farms, with almost all of them having tractors and associated equipment.
And if the farm is too small to afford to buy all of the equipment then they will share them between themselves.
My father-in-law is a dairy farmer with 53 cows and by Polish standards that is quite big and next week he has to cut his 25 hectares of maize silage for winter food. However, he does not own a maize harvester, but his neighbour does, so my father-in-law's neighbour will cut his maize and my father-in-law will harvest his friends corn with the combine harvester that he owns next year.
This seems to be a common practise amongst farmers of this area, and I should think this is practised throughout Poland.