Except all of it was given for free. The tanks that the Ukrainians received were Soviet era ones which they can maintain themselves. The drone's maintenance costs are tiny compared to the acquisitions costs, and the mere dozen of HIMARS are cheap compared to the incredible amount of munitions they were given to fire them. Nothing you have stated has any relation to reality. The US will never make even a single percentage point in income from the maintenance from the tens of billions in weapons given - many of which were literal munitions.