Per Ralph Mowery:
Just about anything should hold it up. I have had some ham antennas up
without much suport. One was about that size and all I had was a pipe about
1 foot in the ground It stuck up about 4 feet and the main mast went down
into that pipe. At the top of the house was a metal strap about 2 inches
wide and a lag bolt on each side of that strap.

Sometimes you can over think things.

Guilty as charged.... and not just sometimes.... -)
--
Pete Cresswell