Have you thought of a "Parts and smarts" biz?
I know of a few Solar, Controls, and Fire Alarm specialists that basically run consulting for specialized work to Contractors. They run the sale to to a Electrical Contractor, and provide plans, parts and technichal assistance. They inspect the progress, and walk away with a check...
However, there is then a fine line between Electrical Designer, and Electrical Engineer, that shouldn't be crossed.
