What part of the country do you live lonestar? Also fyi, many counties have building codes that come into play here. All it takes is a neighbor complaint that brings the building inspector out and then you have real problems. Also one more thing to consider, mounting a dish with as little as possible might "work", however you mentioned "let it spn", well if it can spin then it can also blow off and wind up where you don't want it like through your roof, or worse yet through a neighbors property. C-band only setups don't need to be as stout as Ku setups. Ku setups need to be spot on. A sparrow landing on a dish that flexes could wipe out a Ku signal. From experiance here I have made a 16th of a turn on a bolt and completly lost signal on Ku. Maybe for you your setup is satisfactory. But for most of us it simply will not work due to the freezing of the ground and what is called "frost heave" where the ground will upheave the installation unless you are below the frostline. That is why the hole for general purposes needs to be so deep. To get below the frost line. Have a great day!