Stealth, about how much did it cost to rent something like that? And how did you tie it into your house without paying up front for a transfer switch etc?
about $1350/week. And yes, that sounds ridiculous (and it is), but when you're splitting it several ways, it becomes more managable. That was for a 40KW generator.
You don't need a transfer switch to tie it into the house - the transfer switch is only necessary if you want it to be a failover, where it's already wired into the house. The generator comes with a good 60ft of cables, so i just ran it from the generator, to the feed into the house. the main circuit breaker (outside where the electric meter is) has its own breaker. i flipped that to 'off', and then connected the wires directly to each other. that way when main power went live again, it wouldn't "back feed" through the generator. that would be REALLY ugly.
In theory, you could just plug the generator right into any of your outside power outlets, but you'd be limited to running only what that wiring of the internal outlet could handle. That would be OK if you were only going to be running, say, your hairdryer, coffee maker, and toaster, and you'd just control what got power and what didn't from the house's main circuit breaker panel, but in our case, in order to run any device in the house (lights, A/C, fridge) it had to be connected to the house feed. Plus if you use this method, you have to worry about combining phases, and that can be ugly too.
If you plan on doing this, don't do that i did - i didn't do things the "code" way. The only way to stick to code, is to have a doublepole doublethrow transfer switch. doesn't have to be automatic of course. i now have one, but at the time, it was necessary to just get power back. If you're planning this, i definately suggest you do it the right way. Not only will it be legal, but it will make hooking everything up a lot easier when you actually have to power on the generator.