Neighbor was tormenting my dogs.

Back story:

5 yr old border collie/greyhound mix traumatized by evil neighbor while I was at work during the day, unknown to me obviously. My dog jumped up above the fence line and scratched him on his shoulder. He called animal control and she was quarantined for 10 days.
Started crate training all of my dogs during the day while working for fear that he would poison/hurt them. We have just bought a new house and my parents have been watching them for me while we move in. We are going to be bringing them home in a few days and I would like to be able to keep them all outside during the day. The neighbors on both sides are retired and home during the day (like the other neighbor).

The main problem is that he would use his lawnmower to torment them and now they go absolutely crazy when they hear one. They've never liked lawnmowers, but now the 5yr old one is terribly frightened and aggressive towards them. She is able to clear half of her body over a 6ft privacy fence no problem and that's how she got him that time. I really don't have anywhere in the new house to crate them, and we are going to build on an addition/sun room and keep them in there during the hot Texas summers anyway, but that will be a little while until it's done. She is very destructive when left alone in the house no matter how many numerous tips/training I've tried.

Is there anything anyone would suggest about how to go about helping her get over this event and back to the loving sweet playful dog that could be left alone all day without problem?

Thank you.