Aside from downpayment, you want to have a solid emergency fund in place, something that can cover unexpected repairs, vacancies, or any other random costs that pop up.I’d also recommend saving more than you think you'll need and keeping a close eye on your expenses.

You input and recommendations are greatly appreciated. 

Hey Kaleb,If you’re looking at markets out west or down south, those can be great options, but I’d also recommend checking out Detroit.

A good real estate accountant can save you thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation and tax planning.I recommend finding an accountant specializing in real estate taxation, business taxation, financial planning and tax planning.Consider working with your accountant remotely to expand your options.I would also recommend looking for an accountant willing to work with you throughout the year.

Most professionals will recommend a separate LLC for every $1 million in assets, but I don't think that's necessary.

Quote from @Esther Iroko: @Nathan Gesner please don’t have any attorney that you can recommend.

But I recommend you study it much more extensively before diving in. 

This is (1) not something I'd recommend to a beginner, and (2) not something I've been able to do yet. 

Connecting with local GC groups in your area will help you connect with subcontractors, find out tips and tricks of the trade in your local area (since all areas and their real estate differ slightly).Also, have you considered the motivation behind building a brand-new duplex versus finding one on the market?

Since they've lived there so long, I recommend giving them 60 days to move as a means of softening the blow.Third, don't negotiate or accept excuses.