Both Marty and Regular person have answered some questions playing in my mind, I was not going to post but have thought about my comments before doings so as i do not know either party.
I live in a rural area in the Mid North Coast hinterland. When I purchased my property i was supplied a council letter advising me of the fact the area is rural, you cannot complain about rural noises and operations. I already understood this being a country person, but i can see why they issue the letter with a lot of city dwellers purchasing in the area for holiday homes.
My driveway adjacent neighbour has lived on his 10Acre lot for 40 years. He runs sheep for eating on his land, Kept his 2 concrete pumping trucks parked there (day Job) Plants a few crops of melons and Pumpkins on a patch that other neighbours let him used in return for keeping the area mowed, planted and tidy. He had a 2 acre lot he split off and gave away to a daughter for a dwelling, she sold and people built on it, no probs for 8 years. Then the small lot was sold again. New people from the blue mountains area bought it. Instagram Yoga teaching types from Brazil originally. Suddenly he is getting complaints about sheep noises, riding his quad too much (it is hilly and he has 1 leg (prosthetic for other), tractor noises, burning off complaints. To top it off they pushed the boundary fence over, because it spoilt the view of the creek for their yoga videos. A creek they wouldn't even see if my neighbour didn't keep the vines and scrub cleared back for his melon crop. They, being internet savvy, started petitioning the council about every complaint, and because the squeaky wheel minority always get greased they achieved getting our area rezoned residential- putting everyone's rates up, having the trucks removed from his property as no business could be conducted on the land- his employees and himself drove off at 6 every morning to work on construction sites not on his land. Along with creating extreme animosity among neighbours from calling the police if he lights a burn off pile on his own land, taking out restraining orders against him has made an unpleasant environment with an us against them type situation. This guy couldn't do enough to help when we bought our land, gave us 50,000 litres of water to help out when we first built from his tanks, helped moving big items, keeping an eye on things when we weren't there.
I tell this story as a precautionary tale, sometimes the consequences of disputes or minor differences can cause everyone some form of grief. I wasn't sure from the original post who was there first. Have you bought cheap land in the country for an idyllic lifestyle only to find there is country noises. Has he become a newly minted pilot and taken up a hobby in the last week, or was he a pilot all along and you were not aware of it- did the people sell you the dwelling because of the runway and noise then failed to mention it. I assume you are not in the town boundary and if the house is off grid it would be newer than his dwelling and maybe wasn't there when he first laid out his landing area, because people didn't do that stuff years ago, they had power lines for power.
This is not an attack on either party but points to ponder.
Like Marty said, talk to him, if he is not a cowboy and you believe he safe in his operations see if he will take you up and conduct a landing or 2 (with the missus and kids not home of course).
Perspective may add some insight to operations and such. Even though it is a "Kit plane", someone spent possibly 2000hrs assembling and finishing the aircraft. Don't picture a model aircraft that takes a weekend or two to assemble with glue and rubber bands. I own a similar aircraft and they are sturdy, reliable , proven and perform well at slow speed and mine has 2 stroke under 600cc motor.
You never know you might become friends, A friend is far more better value than a neighbour you hate with a passion and less heartburn.