I don't know the SF, but my neighbor had one put on his CYV about 5 years ago and it was $9300 from T&D. He had the 2 sliding doors removed plus the door frames from the old lanai section, it gives a much cleaner and more professional look. He had them install it with the tinted screen, makes a big difference on a sunny day, you can take your sunglasses off. It's bigger than it looks, he has a big hot tub, a good size water fall and pond and a lot of tables and chairs. Here it is from an overhead view. That did not include the concrete pad you'll have to add.
