I plan on doing buy and hold real estate of SFRs and small multifamilies, so a firm that specialized in that would be great.

Given that you have only a few days I would absolutely start by talking to your inspector and if he/she recommends it, get a more specialized opinion asap.

Best contractors you worked with, specialized in flipping/rehabing for investors.2.

Only 5% of homes are selling for above asking (given they have something special about them). 

Sure it's ridiculously expensive, but for someone that specializes in small multifamily properties, there is no better data source.I also use a lot of saved searches in the MLS that send me everything that sold, price changed, cancelled, came back on market, withdrew, etc.

We do have a 25+ policy as well, but we have broken that on occasion due to the quality of the kids and there were no issues.

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.