I’ve seen several three unit buildings in weehawken recently converted.

@Heather Bailey while I live in my duplex, I have a standard Hazard insurance policy and I also carry an additional 500k umbrella policy (optional); both policies cover the entire building, but there's no separating it. 

Drilling a well or building out a septic?

One more reason why people should stop looking for the easy path to building wealth.Increase earnings, reduce expenses, save, and invest.

This is very useful.You could build a deck or gazebo to house a hot tub.

Split into two buildings.  

Issues 1) even garage conversion ADUs in single family zoned areas typically cost more to build than the value that they add.  

Building relationships with them early is key.For tenant communication and rent collection, tools like Buildium or Avail can make life easier.

I was specifically interested in his 2nd plan which was "Building wealth through single-family homes" where he basically says you save enough to buy your first property along with enough for other fees and then you just keep saving the money you make from that property along with some money you save from your job and once you have enough money you buy your next property and then you basically just keep repeating that until you have your desired amount of properties.

When you can access the opportunities first, you can qualify the lead first, analyse and find the best deals first, reach out and build rapport first , offer your solution first (rather than having your offer thrown on a pile of others the individual has already been given) and so on.