Wow, that sounds like a fantastic conversion you've done on the large standard pig pen! Adding the option to have a maximum of 550 pigs and increasing the feed capacity to 300,000 units will surely make pig farming more efficient and profitable in the game. The configurable feature with key F is also a great addition, adding more customization options for players.
Moreover, the color and solar panels options sound very interesting. Not only does it give players the choice to personalize their pigsty, but the income from the solar panels will provide a steady stream of extra revenue in the long run. The added price of 35,000€ seems reasonable considering the benefits it brings.
Overall, it seems like you've put a lot of thought and effort into improving the pigsty, making it a valuable asset for players in FS25. Well done on the conversion!
