I think I could actually evaluate the price it would cost for building this radar in one year (and quite a lot of cash for asking people that knows more than me) and give and exact amount of money for building it. And one more year for asserving missile on the target. And this means that we can know the cost of this idea for a fraction of the cost of the F35. Which at my experience means that it might cost just an order of magnitude more than the money to evaluate.

Which still means that I am amazed at how much money we spend on expensive weapons that one can defeat with far less money.