"One man's jerk is another woman's husband." Love that, Jerry!

My suggestion is what was implied above- build the new house on the far side of the 7 acres. It's a lot easier to take the occasional walk by than it is to hear quarrels and parties.

On the other hand, is the area zoned? If it isn't - and you put the house too far away from you - that will leave enough room for them to build a NEW house close to your property line which they will sell in order to pay off the property they bought.

Give it up, Beaubear. 'Tis hopeless.