I think all the talk about big stacks skews the thinking of us who have modest
I expect EMT or water pipe will meet your needs.
It's a good chance to learn to use one of the mast calculators.
Diameter is your friend!
I agree with the "What if it fails?" questioner, as long as you can replace the
$20 mast safely.
Use two bearings to take the side load off the rotator.
Keep the rotator inside the tower and locate it so as to put the amount of mast
needed outside the tower.
When you use cheap material, you can put the rotator as far down as you like,
to make service easy.
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