There's also a free windmill reward in the prairie public space. It popped up when I was near the water tower next to the building.
I just got this thanks to your post. It was exactly where you said it would be. Thank you very much.
I received a new reward from the personal space today. I got it as soon as I clicked one of my horses in the stables. Looks like we are only missing the carrot reward for the in-game rewards now.
Prairie Hitching Post: