Current situation I have a primary residence in MA and a SFH home LTR in Akron currently on a 1 year lease.

Over two years, I built up 12 doors, which now generate about $100k in net income annually.

I own a duplex that was built in 1989 and has had 2 stable long term tenants with no interest in selling.

I've owned hundreds of lots and built on very few. 

When was it built, and how old are the major systems?

To thrive in real estate investing, you must maintain a firm grip on your finances.

@Dhruv Patel I believe you are getting ahead of yourself....Where in the US are you all-in (land acquisition, soft costs, hard construction) on new construction multi-family for $100/ft.

Buying a large new build home can also work well as a house hack as you can charge a premium rent, and generally most bedrooms built now a days have en suites (at least in my market).  

There are reasons.b.I just built in a town that was not the best of the ratios.

It can be in the real estate industry, property management, construction, lending etc.