EXCELLENT plan!!

One suggesstion that I would make is this: As some of the other guys have mentioned....get an ARF this winter.....but let me take it a step further......get both a RTF model AND and ARF. Build the ARF this winter to keep the interest, purchase the RTF in the spring....the reason I suggest this is, once you and your son get airborne, you'll want to fly with each other at the same time!

Good luck and welcome to the addiction....er...hobby!