For example if one was close to retirement they may find themselves in a much lower tax bracket. 

Closing costs will be less with this route. 

(for sure they do not, but that does not matter in this case) as the note signed at closing lays all this out.

They accept financing so all cash is not necessary and we are asking them to paying for closing costs. 

This can be advantageous in making offers to purchase more competitive, allow buyers to be more aggressive with purchase price and reduce closings costs.

The studio has large windows on both sides of the unit so i do not want to loose any of that natural light, and I am thinking of eitherA - Doing a full glass partition wall with glass door, with smart glass that can frost to create privacy when in use and allow sunlight when not in use to both sides of the apartmentorB - Doing a higher end full wall foldable partition on a track that closes the whole new "room" into a bedroom but can close back up and fold away to make it a studio again if not in use.Thanks for your input

When we closed on the house my wife and I spent about a week over there doing small repairs, cleaning, and getting it ready for the new tenants. 

Hello, I am currently under contract on two duplexes (4 units) and am set to close next week.

The skills you learn doing this will pay you actual money but also come in super handy anytime you negotiate with anyone, have to put effort into getting a tough deal to close, real estate terminology, contracts, and so on.Good luck with your journey. 

Unfortunately, I closed after classes started and ended up doing mid term rental which then turned into an Airbnb.