How can I make a rod locker for a small jon boat? I want to stay in the dimensions of 84" x 14" x 9" (length x width x height). I want it to be lightweight and semi inexpensive too. I will also want to put rods on top of it with a bungee cord or strap to hold them down. Thanks!

Would think it should be pretty easy and fun project with  just plywood, 1 1/2" x 1 1/2" supports, nice marine carpet and adhesive. You have to know what you want it to look like before you start. No different than putting a deck on your hose for that matter. Having the right tools will be 75% of the battle. Have fun. Sounds like fun.