The single drone was in fact a mylar party balloon.
That means a normal amusement park balloon can lift about 14 grams, assuming that the weight of the balloon itself and the string is negligible.
About 99 of them could probably do the job, though.
So with this lack of information: Why 10 days? Why not 3, or 12, or some other number instead?
Or: Why must there be a number?
Is the officious equivalent of "We've got some shit to deal with, so El Paso's airspace is closed for now" insufficient?
https://lite.cnn.com/2026/02/11/us/faa-el-paso-texas-flight-...
NOTAMs require a range of timestamps for which they're in effect.