I haven't read all 8 pages of responses, and don't know what your total load requirement is, but have you considered using 2 generators? I have NG at the house which is what my hot water heater, furnace, and stove use. A 5KW/4KW generator will power my entire house minus the AC. That includes 2 refrigerators, a small chest freezer, and 2 large chest freezers. The only thing I have to be carful of is making sure I don't plug in all of the freezers and fridges at the same time because the starting load on the refrigerators is so high. If I get everything hooked up, and then connect them one at a time, off setting the fridges by 15 min or so, everything is fine.
With that said, does it make more sense for you to use 2 generators? One to power everything you're currently able support, and another to specifically power the additional load? On the down side, that means you have 2 engines to maintain. On the up side, if you use them frequently, they are going to be lighter and easier to move, and you can determine WHEN you're using each of them so that you're conserving more fuel. Just a thought.
With that said, does it make more sense for you to use 2 generators? One to power everything you're currently able support, and another to specifically power the additional load? On the down side, that means you have 2 engines to maintain. On the up side, if you use them frequently, they are going to be lighter and easier to move, and you can determine WHEN you're using each of them so that you're conserving more fuel. Just a thought.