I'll go against the grain and say I would get a high performance electric pressure washer. For $400-500 you could get a ~3000psi ~2gpm pressure washer. That will provide pretty good performance for most homeowner tasks, and you don't need to deal with maintaining yet another gas engine.
I have a smaller (1.2 gpm) electric pressure washer and I use it all the time during the warm seasons here. It's not the $100 specials at the cheap end, it's supposedly "pro-grade", which probably just means the parts aren't ****. I've used it heavily for 3 years.
It IS too weak for heavy paint prep (if you have really old, peeling paint you wanted to rip off, it wouldn't cut it. But I have used it for prepping paint that was in good condition, albeit slowly).
That aside I find the convenience outweighs it's weaknesses for 90% of what I use a pressure washer for around my house. No gas to deal with, no fussing with the engine, no hearing protection needed, I just plug it in and go when I want to clean stuff.