After a few additional email interactions that same day, your DoC stated "I do not have an answer for you.

I’ve been a serial house hacker in the greater Boston area so happy to connect and share some lessons learned.Multifams inventories are quite low depending on your budget and location preferences.  

Or if you prefer one deposit account bam!

We are always priced under the market average for properties, as we prefer a slightly higher occupancy rate over a higher nightly price.  

lots can go into this somewhat simple question and most of it is personal preference.- you'll want to define "best", and what that looks like for you as a success.- How much money do you have to spend?

Sounds like you've found a reliable resource for SBLOC, but what you are describing almost sounds like preferred equity as well. 

Northern and central NJ are preferred as I am located in Bergen county.

He is my preferred lender, as well as, fellow investor  too.

My goal for next year is scale and acquire at least 5 more properties (preferably multifamily).

I prefer public comments here before you send a direct message, though.