Or one that can be easily adapted?

GREAT ideas for stopping by their place!

Join one and start volunteering - it’s the best way to network and meet like minded people.

There are the obvious pros/cons of a duplex but then there are the non-obvious ones that come with being in Detroit.I actually have a fantastic article about this I can share but I'm unable to link to it in this post.

I saw the building has tenant and even upstairs which is direct to roof this one I got in first floor.

This is what makes the hard money to DSCR combo a great one-two punch for the BRRRR Strategy. 

Since you're open to markets beyond NYC, you might want to connect with local investor meetups or REI groups in those areas to build relationships with agents, wholesalers, and lenders who understand the nuances of each market.If you're looking to break out of analysis paralysis, maybe start by narrowing down one or two target markets and running numbers on actual deals.

Worst case you have zero money and you pay interest for one month on $330 for an “expensive” repair. 

If you are trying to continue holding the other two properties then you should pull out some equity in the form or a cash out refinance on one or both or use a portfolio loan as @Jimmy Murray suggested.

Different with each shop.Sounds like you haven't done one yet.