I agree with the sentiment of this post, but these numbers are silly.
$150m would barely build a bus fleet transit system, nevermind the maintenance, operating, and personnel costs for the fleet (and completely forget about actual long term transit solutions like rail at that cost figure).
And $1b stadiums are outliers – our city got into controversy over our stadium which costed around $250m. Not many municipalities are loaded enough to be getting into billion dollar capital expenditure decisions.