Four or five years ago I got a Karcher with a Honda engine at Costco for right in that price range.
It has been a good homeowner unit for me. Starts on the first pull every time, not quite powerful enough to take good paint off concrete, but it will strip cheap or old paint very nicely.
I have washed numerous driveways, fences, houses, and concrete walls with it. It is good on wheels and tires, but it is too strong for me to want to use it on the rest of the car.
I change the oil every year, and use Stabil in the gas.
Highly recommended.