I have a Delta electric which is a little less power than the gas models but I put it on fan spray anyway as not to dig a hole in anything. I really like it as it's got enough psi to clean anything I've tried and being electric it doesn't make any noise until you pull the trigger and then it's pretty quiet compared to the gas models. I used it for years cleaning boats from 40'-120' with no issues, I also used it to clean my cars, sidewalks, house, fence, etc. The only place it would come up short would be a big concrete job like cleaning an entire driveway but never asked it to do a job that big. I haven't looked for one lately so i don't know if Delta makes or sells them anymore.
Be real careful with your first spray on the house, put it on fan and start a distance from it, only get close enough to have a cleaning effect as I'm sure you could blast through that stucco and foam pretty easily if concentrated in one spot. If you have mildew or anything I would prespray with a solvent from a garden sprayer a section at a time.
Jon