Hi Schmokey.
Try using bicycle inner tubes and a “hammock” approach.
Lower profile than cords.
Screws and washers into the joists. I don’t trust staples.
Though most times bungees fail is they are cheap and you get what you pay for.
Great handle btw, we may be related.
When we were kids my big bro and I used to go by Mo and Schmo.
Good luck!