I'd talk to your broker on what it'll sell for after the fact and where the market is heading over the time you plan to own it. 

I'm from Long Island but now live and plan on investing in the Albany area.

I'm in the market for entity config and tax planning/prep.

The longest delay is the floor plans. 

The struggle comes when you plan to sell, pay close attention to how the bank would treat the loan in the event you would sell.Even though its a bit more work, banks are typically open to these loans as it provides them with additional collateral in the event of default.  

What is your plan after rehab.

@Tonio PearceYes you should create a business plan.

However, i'll likely be looking at additional ways down the road to be even more secure for a backup what if scenario.  

Owning a duplex at 20 is a huge accomplishment, and it’s inspiring to see you’re already planning your next move.From my perspective, real estate investing is a long-term game focused on building equity, paying down debt, and maintaining stability over chasing short-term cash flow.

I would be planning to do some things before actually making an investment.