How do I make the jump to buying bigger units (e.g. apartment complexes) or more SFH's?

I would contact the relevant county court (Kings if Brooklyn, New York if Manhattan, etc.) and ensure you serve the proper notice and such.

You don’t want the cost of court on such a small amount.

Is this something I should wait for the courts to make a decision on before I make an offer?

So I talked to my court house in my city and told me if I wanted to find out the liens for other cities I need call their city court house.Trying to save time is there a better way to do like what can I search up on google to find the taxes or utilities owed on a property.

This is also a small 4 unit complex. 

At least not to put that much value on a single apartment complex.

Each situation is unique, but make sure you understand why it matters to you before you add complexity to your business management. 

A very complex area subject to interpretation.  

It took a lot of planning and commitment, but in one month I will be selling all five homes to start building my first apartment complex with Reunion Investments and purchase my dream home.