You can't just wait to get calls... You need to be the one making the calls.
The problem with those signs here in Lexington is that if you place them in the right of ways, they will be pulled up by Code Enforcement as it in against the "Law". Also it seems that other "Power Washers" steal them.
Are you the one with the Red Letter signs that only say Pressure Washing - Residential-Commercial - Free Estimates - Phone #?
I noticed a lot of those signs here lately. The Number isn't familiar. Not listed with any Yellow Pages or Licensing. Just wondering if that might be you.
Good Luck