Here is a map that could overshadow Old Stream Farm. The Hills Of Slovenia offers a fairly similar experience, namely a grouping of livestock buildings in a single location. Taking up many elements of the basic Erlengrat map, The Hills Of Slovenia is very light and weighs only 77 Mo on the scale.
The scenery, unlike the BlackSheep Modding map, is very hilly. So much so that it is difficult, if not impossible, unless you are very comfortable with the terraforming tool, to place additional buildings or enclosures, at the risk of doing serious damage, with floating structures literally in the air. For the rest, the map is basic but well done, has the basic functions of Farming Simulator 22, and will be more suitable for solo players because there are no large plots to farm.