I couldn't agree more that your plan is a great one. Your barter exchange with the hobby store owner is also a plus.

The simulator is a great way to get started but not the be all to end all. Especially with your son, it will be hard not to think of it as another video game.

Couple of points.. The suggestion of using thumb and forefinger on BOTH control sticks is excellent advice. Get into that habit. It will pay off when you need to get into throttle management and working tricky landings. Also, keep the control box off your lap. You don't have to stand but use it as close to the real world as you can.

Good luck.