I can imagine the time to deliver the plan and rig the explosives might be only roughly a week. And the shot where it blows up is only going to take that one da

I can imagine the time to deliver the plan and rig the explosives might be only roughly a week. And the shot where it blows up is only going to take that one day or night. Then there is cleanup time. So the whole thing only takes a few weeks. On the otherhand a good CGI shot is going to take months. So even if the plane isn't cheaper overall, weeks vs months still might makes sense in the overall production timeline if the premium isn't that much higher.