One of our residents was robbed outside of this property and we ended up paying for the resident to move out and sold this property.

A duplex is a great way to start because that renter will help with your monthly out of pocket costs and it's a convenient way to get into real estate investing.

But if you ever feel like you’re not scaling fast enough, you could look into the stacking strategy that Brandon Turner talks about.

This would be in central Jersey which is still a hot market as a result of record low inventory.I am planning to do this strategy since I want to put low money down (10%) on a construction loan and achieve a quick build to lower my holding fees. 

You will get some of these as well (This inquiry was for one of my 1500 SF 2 Bed + home office units)..... but by no means does this investment strategy warrant paying for a course.

I will look into those strategies.

Quote from @Mario MoralesMorales: what if he got a HELOC, used the funds to get a property, then cashout-refi the new property and pay off the heloc?

You've done well with your Class A rental, generating $500/mo in cash flow, this adds up over time.

The problem you're going to run into is Fannie/Freddie doesn't allow second home loans on anything but a single family residence (yes can be condo, townhouse, etc. just not 2-4 unit) so you're automatically thrown into the investment loan world.

It is no use buying a US property, if you can't open a US bank account or file a tax return.