You should really consider all the electrical devices you would need to keep running at your residence. In my case I get water from a well so I need to run a substantial pump. You also might need air conditioning, lighting, and refrigeration. I use a 5KW generator (not name brand ~$600 from Home Depot) and hardly notice power outages in my rural location.
Obviously this is overkill, a small Honda generator that produces 200 to 500 watts would be more then adaquate for ccpd and/or dialisylate heater. Make sure it is easy to start and will not need refueling too often. Buy a long electrical extension cord so you can place the generator in a quiet location outside your home.
One more thing, a rough guide to properly size the generator would be to look at all the wattage label on each of the appliances you would be running at the same time and add them together. The wattage on large appliances with motors, like refrigerators, should be doubled to provide enough wattage to start the motor.