Ok, considering this is in Canadian dollars, which isn't worth much, everyone else can cut the cost in half.
rounded off:
Used dehumidifier =$50
fan rheostat =$10
Eheim 1048 =$99
10' roll of 1/2" tubing=$5
waterblock =$50
pipe insulation =$2
antifreeze =$7
res (waste basket)=$2
clamps,tape, etc. =$2
total =$227...or about $110 US
no hassle, no headaches, and the compressor/evap/condensor math is already done.
My water temp is -10C, and the compressor cycles every 3-4 minutes. It'll outlive the processor.