alt Hacker Newsoo, fermi estimate time!
Typical 50% RH at ground level is ~7g/kg air, air is roughly 1kg/m^3, so between the surface and the planetary boundary layer (let's say 1km) is about 7L of water per m^2 of surface. Moving along at ~3m/s means 21L/s passes by each meter of fence line.
PBL probably mixes after about 50km, so it takes ~5 hours to normalize after you pull out water at ~5 knot wind speed. If you want to not make a dent, means you can pull less than 1L per m^2 per hour, or about 8m^3 pear, which is about 8x the yearly requirement for farmland.
So, you can irrigate a farm and your neighbors would mostly be fine.
(math not checked)
Absolutely can pull the water you need for e.g. household purposes out of the air - somewhere north of $0.10 a gallon or so, spendy, but close to trucked water - maybe $1k a month, give or take. People pay that much for trucked water, though a well is rapidly cheaper if it's available.
For a farm, say growing almonds (notably water intensive, but a reasonable first pass), you need about 4 acre-feet per acre per year, which would cost... hmm, somewhere in the very rough ballpark of $200k / yr.
That might put the economics of almond farming substantially in doubt, given that an acre of almonds might yield a value (revenue, not profit) of, say, $10k on a good year.