So I've got some invaluable information for my other thread. https://www.geoexchange.org/forum/threads/new-installation-questions-ideas-and-justification.6722/ But a lack of trustable installers in my area, I'm seriously deciding in just trying it myself. No designer or no contractor (except a friend to dig) no hvac. I've done my heat gain/loss and I need 22000btu cool and 60,000 heat. That said my main push is for a resonable ac, any heat will be a bonus. I have found a 1 ton wshp on ebay for $300 and it's local so I can just pick it up (300$ saved). I believe I can also pick up 800-600 ft of sdr11 hdpe for around 325$. My friend is Pritty sure the digging can be done under 100$ if all goes well. Hvac right now for the 3 rooms I want to cool is all flex duct now so I have no clue what hvac will cost. And Im thinking I can build a good flow center/header. So if I can piece $7 to $800 buck dig a 100 to 150 ft. Trench 8' deep and bury a slinky loop and patch in the wshp into the hvac for ~600 sq feet Of the home with lots of prayer(probably head ake) hope for the best? Any thought, potencal problems, criticism, and expecially pointers welcome. Thanks for the read.