I know the different types of investing and have chosen my niche, which is of course (wholesaling), being the reason of choice strictly from financial lacking.

However, in some historic districts you have no choice but to replace with original materials; you should make sure this doesn't apply to your situation.  

I also don't streamline a lot of the work - by choice.

Is there an equivalent for multifamily brokers or just start with some of the larger brokers such as CBRE and Marcus & Millichap? 

Gain experience and then step up to larger investments.

Hello BP, so appreciation in condos is slower compare to a single house & it is true in my areas but because of the limitation in purchasing other type of properties, i had very little choice if i want to do a syndication on multi family units. 

Since Wholesaling really requires you to build up a list of cash buyers, that seems, to me, a bunch of work for a very small piece of the available profit on a deal.Why not search for cash lenders or cash partners instead and maintain a larger piece of the pie?

My other properties are larger than 2-families so I'd never experienced this before.

Though I am not entirely experienced in this subject, I recall from some of the podcasts that larger banks like BoA can sometimes offer lower interest rates on their products under certain circumstances compared to a smaller bank or portfolio lender. 

They want retail agents who are going to bring in larger commissions checks   Not really worth their time working with agents who want to be investors.