Use quarter inch or three eights thick plywood for your sides bottom and drawers.
You might want to sit down and draw out some dimensions to work with.
I'd make it at least as wide as a fuel can or bottle and long enough to carry the stuff that you think you'll need. (minimums) props, tools, fuel pump, glow plugs, glow driver or maybe a power panel and battery. Look around at the ones modelers are using and the ones available from the hobby stores, you'll get the idea.