Does anyone know a NJ realtor who specializes, or has a lot of experience, in multifamily properties?  

If you plan to get into mobile home investing, it's best to study up on the product itself and network with other contractors who specialize in working on mobile homes should you need help with the fix-up work. 

Seeking advice/input on how/where to find CFP’s/CPA’s specializing in real estate investing in my area.

Also, while delayed financing is dried up at the moment, MC Mortgage in Wilmington, NC specializes in helping investors and they know their stuff backwards and forwards.

Do any of you specialize in this? 

I don't have many recommendations for OOS specialists (because I live here), but @Alyssa Dyer with Table Investments is/are very knowledgeable and responsive and specialize in working with people outside Oklahoma.Rhett Tullis is a property manager that I haven't personally worked with, but who was very helpful to my sister when she was exploring investing here from Texas.

You can also form what is referred to as a Checkbook IRA by having the self-directed IRA purchase ownership in a specialized LLC entity. 

To your deal...I am a landlord and co-own a property management company that specializes in South Jersey.

@Ryan Stevens You know that thing where a magician does something with his left hand while he tells you to pay attention to his right hand, and then produces something from his left hand that already existed, but feels special and exotic in that moment?

He is located in San Jose, CA, but specializes in Kansas City and Indianapolis.