This was a fun project I did a few years ago, a custom-built porch bed swing frame. It fits a twin-size mattress. Since this is used outdoors, I searched for a relatively inexpensive foam-type mattress and found one on Amazon and also used a zippered mattress cover to help protect the mattress from the outdoor elements.
If you are interested in having this porch bed swing built for you so you can enjoy relaxing in comfort and enjoying the cool breeze, send me an e-mail at info@craftycanuckhandyman.com or text message at (404)-465-1782. The price is $800 and includes the frame, rope, hanging eye hooks, and your choice of color (mattress and mattress pad not included), and delivery for customers local to Roswell, Alpharetta, and Johns Creek. Shipping is not available.