We did that very thing several years back, Smiley, when we renovated our kitchen - added a sunroom. We built it new, though. But it has a slate flagstone floor, French doors, eight Windows a slider leading to the deck, gets sun all afternoon, etc. and we spend a lot of time out there. We put a TV on the wall as well as an electric fireplace, so it's super cozy! We also have the beachy feel here! (We lined the walls with tongue and groove fir and used a semi-solid taupe color stain; we have white wainscoting in the rest of the downstairs rooms with a Mickey Mouse yellow on the walls.) I love the idea of using a room you already have, and I love the daybed, the grands will love it! Isn't it fun when a great idea hits you like that? We have so many ideas for our home still, but with two going to college next year, we may have to put most of them off for a while.
TMM, glad you got a surgical date fairly quickly! Sending good thoughts and healing to you. Don't forget to ask for Reiki when you get to pre-op, if they offer it. Stay in touch!