I don't know what's typical out there but I can tell you those types of signs are very typical here. I haven't seen one for HI yet. Health Ins, Doors/windows, tree trimming, furniture, movers, plumbers, foreclosure/credit help, etc. Signs like that are at almost all the expressway on/off ramps and major intersections some city mostly burbs.

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Accurate Inspections & Consulting, Inc.
773/844-4AIC
Markus Keller