Worth making 2 bedrooms 3?

[Brandon Roof]

I viewed a small >1000 sq/ft, 2 bed/1 bath home today with an interesting bedroom setup. One bedroom at the back of the house measured 8' x 10' while the master was at the front of the house and measured 18' x 12'. I intend to make this rental, but in doing so am seeking advice as to the best long term play.

- Keep the giant bedroom or separate it into 2 approximately 8' x 12' bedrooms?

In doing so, I would have to add a window, door, a little ductwork and a closet that would eat into the square footage of the newly created bedroom?

What kind of costs can I expect from this project and will the long term benefits outweigh the initial costs? Is 8' x 12' a little to small to chop this room up?