Unless a different one would be better that you could suggest   If you are house hacking you can utilize 3-10% down. 20%+ is great to put down but not always possible.

Any suggestions would be greatly appreciated.

Quote from @Aaron Raffaelli: As the title suggests, I am just starting to enter the REI world.

Make sure you account for all of your interest load if youre using a Heloc for permanent financing as you suggest.

She suggested she might have to add the ex to title before closing. 

I'd be happy to provide some recommendations and suggestions for your situation as a foreign citizen living in Miami.First, it's important to have a good understanding of the local real estate market, including pricing trends and neighborhood dynamics.

Since you mentioned that you are getting started, I highly suggest you house-hack (this is how I got started in Costa Mesa, Orange County).

I think all of your suggestions are great possible ideas to do this deal! 

I would also suggest researching the developer’s experience with similar projects.

He has suggested an 8-unit building.10,000 sq/ft @ $215 sq/ft = around $2.15MEach unit will be worth around $268,750The current plot of land is currently zoned for a duplex without further approval from the city/community, but the zoning on the land can allow for up to 8 units by applying for a Special Use Permit through the city.