Stony,

You can take this for what it's worth...

I've got a fairly inexpensive electric pressure washer. It came from Lowes, I believe.

We use it about a dozen times a year, and have had it for about four years. It works just fine and I've never found a task it wasn't up to. We've cleaned masonry, home exterior, etc, etc.

It'll cost you about 1/3 of what a gas powered one will cost.

87 Montero, bought new, by me -
88/89 intercooled Starion Turbo engine-
with awesome audio.