A guy came today to do some core drilling for me on a couple of walls, he had the quietest generator I have ever heard a 12.5 MQ was made by Denyo of Japan had a Isuzu diesel engine but was assembled in the USA fine piece o equipment He told me he paid less than 7,000 for it in the quite box said it would run 2 days under load on 5 gals of fuel that one I question lol might be something for you to check out it made for use not like the rv stuff