I thought you were building to sell.

Looking for some guidance on resources of how to begin analysis or how to build a business of this sort.

Im currently networking to partner up with a home builder here in Staten Island and build Semis on empty land.

Building a 4,000-square-foot, three-story duplex with a 1,000-square-foot ADU could cost about $1.83 million, including construction and permits (excluding land).

@Collin Hays I completely agree with your theme of building a local banking relationship, which should help someone build their real estate portfolio, but I have a couple of questions.When I read "conforming" and "non-conforming" loans, I think of the loans being underwritten as consumer mortgages.

It makes sense for your new build but you'll have leverage something (fixed rate) to get out of that loan. 

Build a strong network of mentors and industry professionals! 

Cash flow approximately 350 a month.Option 2: Use the cash to buy land to build a 6 bed 4 bath duplex, all in cost approximately 300k/330k. 

Let's break it down with precision:The "Pain" (At First Glance):Your $2.8M sale splits out as:Building (§1250): $2.3MPersonal Property (§1245): $500KOriginal Basis Allocation:Building: $1.6M (depreciated over 27.5 years)Personal Property: $400K (fully depreciated)Building Depreciation:Annual: $1.6M ÷ 27.5 = $58,182Total over 10 years: $581,820Gain Breakdown:Building (§1250):Sale Price: $2,300,000Original Basis: $1,600,000Less Depreciation: ($581,820)Adjusted Basis: $1,018,180Total Gain: $1,281,820Unrecaptured §1250: $581,820 (25% max rate)Capital Gain: $700,000 (20% max rate)Personal Property (§1245):Sale Price: $500,000Adjusted Basis: $0Ordinary Income: $500,000The Strategic Play:Remember those suspended passive losses you couldn't use?

In Reno and metro areas, insurance companies primarily focus on roofs, the age of the building, wiring updates, and water pipes, as mentioned @Cameron Moore.