I would suggenst that first thing is to go and talk to the people concerned, you might find that they may be easier to deal with than you first thought. I would also suggest that you think about offering some free flights to the staff of Bosch let them come out and see the way of life that exists around your airfield, most of them pprobably have nothing to do with the applications, you might even get some new customers,set aside a weekend and one aircraft see what happens. If you get them onside you are laughing.
If all this fails, then talk about the new problems that they will face by having a turbine there, whether it be noise, the added risks to aircraft, possibly falling on them and that you would have to change the noise abatement procedure and fly over their houses.