This got me wondering, how low would the cost to reach LEO have to get for it to start making sense to use Falcon 9 + Dragon to deliver an SF team (e.g. command

This got me wondering, how low would the cost to reach LEO have to get for it to start making sense to use Falcon 9 + Dragon to deliver an SF team (e.g. commanders in-extremis force) to an objective? Then that got me thinking about the reality of drop ships. Isn't that the next logical progression? I mean, currently we can put a battalion of paratroopers anywhere in the world with 48 hours notice. We can put a Ranger company anywhere in the world with 24 hours notice.