Earlier quoted context omitted.
Whose money are you volunteering to be spent on that?
I'm sure you could trade a handful of Patriot missiles and one or two F-35's to fund it several times over.
Arecibo cost $9.3 million in 1963. This is equal to $79,000,000 now (https://www.in2013dollars.com/us/inflation/1963?amount=93000...).
An F-35 costs about $100 million.
Based on that, I'd be happy to give up a single F-35 to rebuild Arecibo.