If cost is a factor, which I figure into everything it seems, two Honda 2000s are cheaper than one 3000. Add the extended run gas caps and a 6 gallon portable marine gas tank, and it is still cheaper if you shop around. I didn't shop very much either. The advantage to running one 2000 as opposed to one 1000 is the coffee maker. Or the toaster. Or the microwave. All of these are handled by one 2000, but the Dometic microwave will prove to be all it can handle.
As far as fuel consumption, according to the Honda dealer I bought my first 2000 from, the 2000 is actually cheaper to run at comparable watts, say 500. That is half a load to the 1000, but loafing for the 2000.
If I want to run my AC, I hook up my parallel cable, start the first 2000, then start the second 2000. I then turn off the eco idle on both and power up the A/C. After it has run for a little while, I turn on the eco idle, and they idle down as needed, and easily start the compressor when it needs to start. I have tried a few different times, and one of my Honda 2000s will not run my A/C, but the two of them handle it easily. I do leave my A/C fan on continuously, so that may help, but I like the white noise.
