It's just a case of getting the 10K from the cow (5K) and 5 milk churns (1K each) and not putting bears into your warehouse
Immediately sell the pig and the chicken for 550 - this is your working fund as it does not affect getting to the 10K total
When the car comes back, upgrade the warehouse once so it will take 2 milk churns and the car once so it is quicker - this will leave 100 to keep the cow watered
When you have 2 churns, send them in the car for 2K
Repeat for the next 2 churns
When the 5th churn is produced, send it and the cow in the car and you will get 10K in less than 2 minutes
Hope that helps