What brand and power size of generator do I need ?

I disagree Wrench. There are some definite benefits to the dual portable generators. I had a pair of yamahas for awhile. I am now back to a Yamaha ef3000iseb. It's noticeably quieter, has a slightly longer run time (The Yamaha ef2000 can't be run off of a separate gas tank), and I maintain only one machine. It sucks to move the 150 pound thing but as a whole, the single generator is best for me.