Randomizing Houses (Farms)?

[warcraftmodding123]

How do I make each time a farm is built for it to be randomly one out of three farm models?

 

[Pyrogasm]

You need 3 different farm buildings and one dummy farm. The workers should only be able to build the dummy farm building. Then Detect when the farm finishes getting built, remove the built farm, and replace with one of the 3 possibilities chosen randomly. If they're supposed to have different build animations you could possibly do it before they're completed but I'm not sure what event you'd be looking for.

 

[Dr Super Good]

You might not even need a dummy farm. You could use 1 of the 3 possible farms as the dummy. It is important that you treat all 3 types of farm the same, especially when it comes to interacting with them using triggers.

In StarCraft II there are dozens of ways to achieve this using actors.