Ya, a DWC system is much simpler than a
aeroponic system, and is a great system to get your feet wet with. I just have a couple of thoughts. You mention the air
pump is a "40 gph" (gallons per hour), but air pumps are rated in cubic feet of air per minute. So I think what you have is a air pump that's designed for a 40 gallon fish tank. If so, I think you may want one for each 10 gallon tote for better results.
Also, if I'm understanding correctly, your lighting system is planned for one light fixture with 2 florescent tubes for both storage totes, if so that wont be enough lighting. Halfways lighting (the guy at Frugal Hydroponics) is using 3 times that.
lights.html#post6978" target="_blank">It is a simple rig of three T8 48" dual shop lights fashioned together to create a 6 light system