Ok, so I'm looking at the Sears website, and the smallest (cheapest) Kenmore dehumidifier.
Kenmore humidifier
It's rated 480 Watts, and goes for $150.
Add a block $40
a good pump $60
and voila, a $250 cooling unit.
(some mods required)
Use windshield wiper fluid, some tubing, some foam, a relay, a temp controller, ...
I am happy.
Now the big Q: do I still want to use a pelt with that?