Shop air dilemma

I need that inline air drier. Bad. One for home and probably a couple for work, because of the length of the lines after the compressor
Yesterday I was changing tires on a triple axle trailer and twice in the time it took me to unbolt and bolt on 6 tires I had to stop, unhook my gun, and stick a male adapter into the coupler and just let the air run after my $600 snap on impact started spraying water like a faucet. I'm getting tired of that especially when work don't buy my tools or pay when they need sent out for rebuilds. I do go thru alot of air tool oil as well.