vanderzac,
Check out the other thread more drilling and digging oriented:
http://ecorenovator.org/forum/geothe...ging-gshp.html
You can find all specs and details about my rig. Pay attention to sliding table that holds drilling pipe. It saved me ton of time and calories
.
In my location (Canada) I have to worry mostly about heating and just a bit about cooling. Because of this my focus was earth. In your case you only have one problem - heat rejection which can be achieved in very efficient manner without drilling and digging.
Here is very cool link about !!! residential !!! evaporative condensers:
http://www.pge.com/includes/docs/pdf...e/ac2eval1.pdf
Building a drilling rig is not an easy task. By the time you finish it you will double your initial budget and triple the time you expected to spend.
The system that you have now can't perform like refrigeration system because of this you waste so much water and move so much air.