RT ss Agile generator or alternator with 2500 watt inverter?

Try running your engine around here for more than 3 minutes and you can be cited by strata for noise violations. Using the car engine to power coach systems seems a lame alternative unless you can do it at no expense to engine wear and tear and your nerves plus are allowed to which isnt the case unless you are in the middle of a huge Walmart parking lot with no one around. I dont get it. Seems to be a non-solution to a problem which didnt exist in the first place. Nothing wrong with a generator IF you can run it.