US Defense spending is bigger than that $1000 B per year, and on its way up to $1500B per year. I wouldn't consider a $25B operation a drop in the bucket of that larger number, it's a significant outlay that has been a huge cost to military readiness, massively depleting our precision munitions. We don't pay the manufacturers nearly enough to keep production lines up, and we are a decade away from being back to readiness again. It's going to take years to pay massive amounts to bring those up to scale.

$25B in a few months is also more than the average annual amount of military aid sent to Ukraine from the US, and the Trump administration considers this to not be a "drop in a bucket" either, and in fact a huge imposition that should not happen at all.