I need a place to bulk age kegs but I don't have room to build a cold room. I also don't have a basement or celler. What if I sunk a couple 50 gal barrels into my yard. How deep would I have to go to keep a constant temp year round? I live in the NW so weather is pretty mild most the year and my property is pretty sandy so It would not be much work to put them in the ground. Is this a stupid Idea?