Hey, My heart jumped out of my mouth when i read the description of the project, I'm a unity3D game and APP developer, I have this unity package and recently i started to make a game for my girlfriend. I did the same thing that you need. I recreated the scenario based on farms and city's. I used animals instead of human characters, I recreated all the game visual using that system. I will do that job for you very happy and with a good quality. I have a lot experience with that asset. See my portfolio to check some projects that i worked on. I'm new at Freelancer.com but i'm in the market in 4/5 years with game development, contact me.
I lowered my price to be the "guy", I'm really excited to work on this project.
Thank you.