and telling him he shouldn't try doesn't help anything either, all that will happen with an attitude like that is someone cobbling something together, just to spite you, and then not posting to ask for any help or guidance before they take it out on the road, and not accepting any critique of what they did build. If he has competent help, then he is capable of getting this project done. If he isnt afraid to ask questions, then he is able to get it done CORRECTLY.
I'm sure you were born with all the knowledge of everything, and never had to ask any questions, or ask anyone for help.
Asking questions is the way everyone learns, if he doesnt ask, then he will never learn. Those are the people that tend to build the scary shit.