That house was completed, listed on the mls for 624,000 and is currently under contract.  

It may also be of benefit to you to connect with a Realtor, as they have access to an MLS (Multiple Listing Service), and will be able to run more accurate numbers for you. 

Is your "insurance guy" a captive agent (one company) or independent (able to shop around)?

We initially were looking at 3-plex properties but they are mostly listed close to $650k.We saw and have interest in a 4-plex in Irvington, NJ listed at $700,000, fully occupied.

I reached out to all of the listed contacts.

Hello everyone,I'm a real estate agent assisting a client who is trying to list an Accessory Dwelling Unit (ADU) for lease on Zillow.

& feel free to mention any other passive investing vehicles (in the real estate space) that i haven't listed here!

If they didn't pickup or call me back within a day, I crossed them off my list.

Good restaurants, parks, shopping...general things to do?

Buyers will be required to sign a buyer agreement prior to showings, many states operate this way already, and it can be specific to a period of time, specific property or range of shopping options the broker is to assist with. - Buyer broker commissions will be more transparent and in all likelihood begin to trend downwards.