In the list of objectives/challenges to complete locate the challenge for moving facilities a certain number of times. Find a large tree thats easy to click on and move it over a couple squares and click the check mark to place it. Keep repeating this and you will complete a challenge that goes all the way to $120,000 as a reward and only takes about 50 minutes to complete. It is possible to earn $275,000 for moving an object 4,000 times and the challenge is free.