I have a small test turbine ~ 5 ft mounted on 1 1/2" pipe, slid into a 2" bolted to the side of my shed through a seriously reinforced wall (2x4 " s side by side) . Number of blades help the vibration at low rpm, higher # lower vibration, I'm running 6. The pipe in pipe is damped somewhat by covering the 1 1/2 " portion that slides into the 2" with a bicycle inner tube.
Still the vibration is annoying, as is the sound, I would not want to live in the shed, cabin or house with it attached.
Still, as evidenced by my marina, there are a lot of sailboats out there with mills on em, I guess vibration is dampened somewhat by the water. But the noise can be deafening. Of course these are smaller turbines as well, but it does show there is an application for mounting a turbine on a structure, albeit a floating one.