There are plenty of mom & pop businesses that just need someone to setup their computers, network them, and ensure they're not being infected with shit. You'd be surprised how many people struggle with email, documents, spreadsheets, a printer, and maybe an app or two.

Think of yourself as a blue-collar contractor providing services to white-collar people afraid of being taken advantage of. Your competitive advantage over Geek Squad is being the local IT person who knows the names of everyone in a five-person real estate or law office.

Word of mouth will take care of everything else for you.