You might want to consider negotiating with the seller to resolve these issues as part of the deal.House Hacking: Living in one unit and renting out the others can be a great way to cover your mortgage and build equity.

Parent A, parent B and Aunt A don’t live in the property.

If your wife is comfortable living close to other tenants you can get some low down payment loans and have the tenants cover most if not all of the mortgage. 

Don't count on appreciation, even in a seemingly hot market like Florida.

Conversely, I want to take that money and drop it on a Single-Family Dwelling in New Jersey (where I currently live) and then rent it out. 

@Art Maydan I live in an area with lots of radon issues due to geographical issues.

We value your tenancy and are committed to working together to ensure a positive living experience for everyone involved.Warm regards,

If we have tenants that live in a unit for a few years and asked about a cat or smaller breed dog, that's a different story.

3.Hot tub maintenance for short-term rentals: cleaning & water changes?

The numbers look good, you included many categories posters frequently omit, be forewarned real life never lives up to these projections.