Finding an Agent in New jersey

[Jay Kay]

I' want to get into real estate investing. The goal is to start out owning a duplex, where I can live in one unit and rent out the other. My issue is, I'm willing to live in multiple counties across the state (Mercer [where i'm from], Somerset, Middlesex and Camden). How do I go about using the knowledge and expertise of an agent while not becoming too much of a burden by making them show me houses all over New Jersey?

Should I have realtors for each specific locations? 

How would you go about this?