Missing textures on preplaced buildings.
This is just now from my saved game. It even looks like the background (off map portion) is white. Are you on the MAT download or the original one? Also since you brought up GE. Click the main waterplane transform group, with it highlight under attributes (right top of screen in the transform tab. Go down to visibility and un-check it. Click elsewhere on the screen. That will make the waterplane invisible and you should be able to delete those fences/buildings. Then just re-click the visibility thing for waterplanes so they will show back up and save.
I just installed FS on my laptop, that farm is all white along with one more. Can you confirm that the random houses, the dealer, and sellpoints are fine for you? Also the farm in-between fields 58,142, and 59 (north eastern area), is the only other white one.
I'll delete those and hopefully get new files uploaded in the next 30 mins to an hour.