I think if there's enough wind to move a ton of machine & trailer , the house will be gone as well, or damaged too bad to power hardwired. I kept it mobile.
Just my opinion.
Just remember that a trailer doesn't have much ground contact other than a few sq inches (2 tire patches & 1 landing leg skid). If you hooked the trailer up to a truck even with trailer's parking brakes set & landing leg down it could be drug on a wet surface...grass, gravel with not a huge amount of energy. Would be interesting to test the break point of loaded genset trailer using a force guage.
Not knowing the exact coefficient of drag of genset/trailer a ball park formula for calculating wind pressure is:
0.00256 x wind speed squared = XX psf. So, using a 100 mph wind example: .00256 x 10,000 =
25.6 pounds of force per square foot of surface area. For a 150 mph wind that = 57.6 psf.
If say, there was a quartering wind and area of generator & trailer lets say presented ~50 sq ft of surface area (tires, trailer, genset) that would equate to 1,280 lbs of force acting against the trailer. That's just a SWAG, it might not be enough to flip it or move it into your neighbors yard but it might not be sitting exactly where it was parked and could break the feed cable connection to an electrical hook-up if trailer pivoted or swung an arc beyond cable slack. If using a 150 mph wind for a surface area of 50 sf the force goes up to
2880 lbs force! But again that's a swag using 50 sf of surface area, it may be more or less.