Take a bathroom for example.

You can give them separate living quarters, separate entrance/exit, bathroom, etc. 

Having three full bathrooms will be best for either of these strategies no matter what. 

Does anyone have a recommendations for a real estate agent in Naples, Fl with contractor contacts to assist with bathroom and kitchen rehab?

Marble backsplashes, all new kitchens, bathrooms, HVAC, electrical, refinished hardwood flooring, etc, all with the idea that we would get better tenants, higher rents, lower vacancies, and less maintenance/repair requests. 

New roof, new water heater, new Electrical panel, New HVAC, new Concrete driveway, new Concrete steps & walkout basement, Open space of kitchen and living room, fully finished basement with wet bar and new full bathroom, new windows.

I'm talking about nice charcoal 2x2's and ivory, etc. and I have never paid more than $.25/ft for 2x1 and 2x2 foot tile which sells for $3-6 per ft at the Big Box.The second thing they have in abundance are bathroom vanities.

Drive in multiple bathrooms 8 per a trailer, ladies' bathroom inside. 

As far as ROI, there are a few givens that will always give the majority or even dollar for dollar back, such as landscaping, flooring, updated kitchen and bathrooms, and security systems.

Like ok the bathrooms are done, pay them a certain amount.