No, I don’t think I will. The goal is to avoid war, if possible, and defend Taiwan if we have to, and to make the PRC regret having chosen to invade Taiwan because they couldn’t relinquish their One China position. Deferring to the CCP’s chosen policy is not an option.
War costs a lot of lives, but a hot war between adversaries means making the adversarial position suffer more for having taken up arms in the first place. A defensive war over Taiwan and keeping our promise doesn’t need a number on the table in advance to make it worth doing. It’s crass to even ask. How many American lives will it take to sink every boat belonging to or commandeered by the PLA in the Taiwan Strait, shoot down every jet that flies above and mow down every pair of PLA boots that lands on Taiwan’s beaches, and destroy every military shipyard on their coastline? Let’s assume this isn’t purely an American fight, you know, for the sake of argument.
If you can figure that one out, you’ll have something close to your answer.