Neighbor dogs sharing a fence, advice?

[AdrianneIsabel]

I grew up in a rural area and in Vegas we had cement block walls for fences. So, I'm rather inept here and am curious how others have handled this. Our new house has one dog to the left which shares a wood fence and three dogs to the back which share a wood (their side) and chain link (our side). The dog on the left is reactive but didn't seem that worrisome, however, the three at the back are nosing under their fence and pushing against ours.

Our goal is to refence the whole yard with buried bottoms but that will have to come after the inside remodel.

Backup today was clueless, which I love, but my other three won't be so easy going.

I will definitely work on my dogs reactions, they're almost never outside alone anyways, and the owners at both homes seemed to react and recall (effectively) their dogs within a few (2-3) minutes but... Suggestions? Has anyone tried befriending? Or deterring? Suggestions for cheap fencing as added security for our side right now until we can afford a new fence?