Fence Installation Photos in Adobe Photoshop Using JavaScript

I have a complex problem I am looking for someone to solve. I have the JavaScript already written, but I would like to see if you could help me troubleshoot why it does not work correctly. This program is supposed to add fence images to house photos in Photoshop. So, I have attached a house photo as an example. I want to automate where the fence goes in these images so it looks like it belongs in the house image.

I am using the extendScript toolkit CC to make this happen. If you can fix the script, I can send you all the files. I want to dictate where the fence will go by coordinates and then place it on it. But it must work so it does not cross over on the house's driveway. There are about nine images per house, so I need to change where the line will go over every nine batches of photos. Take note that there are at least 3,000 styles of fence sections. So, this needs to be automated as much as possible.