I just purchased a Shark hot water pressure washer. I bought it primarily to keep the truck and machines clean of salt after storms. Now, considering how much I paid, I am looking into possibly offering pressure washing service to my repertoire. Siding, fences, concrete, equipment etc... Now, I'm new to all this and politely ask, so as not to be the low balletr and under cutter, what is the going rate for the north east per square foot, on average? Any help would greatly be appreciated. Thanks.