Great plan. I have a generator on my high priority must get list (tax return time). Last year when I had some work done on the house, I had an electrician install a manually switch on my power panel, and run a line/outlet to the back of the house for a generator hookup.
Not as expensive (or reliable) as an automatic starting generator, but it'll do the trick. The plan is to rely on B-11 pumps on a temporary basis until I can get to the house and power the generator up.
I am thinking to get an 8000 watt unit. While I probably can't run the house and all the tank lights. I should be able to power house necessities, tank necessities (heaters and pumps), and maybe a few T5's. It may not have enough juice to run everything and 3xhalides for an extended period.