As someone who hates the Chinese government with a passion, I would love to see a China-U.S. war over Taiwan. The U.S. should also get Japan and South Korea involved, and NATO if necessary.
The costs of fighting a technologically advanced war in the Pacific will mount quickly, so the point of military action wouldn't be to occupy and crush the Chinese government, which isn't feasible. The objective of military action would be to force China to reconsider the strategic calculus of occupying a democratic, self-governing island, and the best way to do so would be to respond to any Chinese attack with overwhelming firepower in the first few days.
Lay naval mines in the Taiwan strait and in the South China Sea. Coalition submarines and AWACS aircraft patrolling the Chinese coast can provide early warning of any impending air and/or missile attack. It will be a highly technological war involving naval and air assets as well as land-based missile systems; I don't foresee a lot of sweat-and-blood, hand-to-hand fighting between groups of infantry.
That's just ridiculous. The U.S. economy and debt and spending is measured in terms of trillions. One billion dollars is a rounding error.