If it does change, what are the best practices, calculations/ number, and strategies to follow and ensure all debts are paid and the property properly cashflows? 

While you did not mention how many bedrooms or baths each unit is, so I cannot properly speak to the approximate rent, I am confident that it would not be near as high as 3500 a month.

Another option would be a Monetized Installment Sale.

I need to upgrade the panel and rewire the house and plan on having more lights and outlets installed.

That's why I also did all the home depot runs, worked with the contractors, installed the floors, etc.   

The fact they are complaining online might be an indication the property manager dealt with them properly so be sure to ask the manager for their side of the story.I hope this basic guide helps.

There are minor repairs that are needed (about $3000) + I need to install appliances ($2000). 

Does anyone know where I can find the proper info on this for Florida???

Assuming its best to do out of Austin proper due to prices and do flips to build up reserves to buy and hold eventually?

I'm renovating a 1300 sf duplex, 650sf per unit. One unit was completed a couple months ago and we did tile, and granite, new cabinets, total new bathroom. The 2nd unit is now vacant, we already did a new bathroom, no...