To sort of sum things up, how your antenna is supported, center/ends,
isn't going to make a lot of difference. Of course, building the
thing strong enough to support it's own weight is a 'biggy'. Making
it 'fit' the area you have to work with is also a 'biggy'. Then it's
just a matter of 'making do' with what you got, sort of. Probably
won't be the absolute bestest in the world, but so what, it'll work.
- 'Doc

(when you figure out where to place those 150 foot towers, and make
the whole mess rotatable, THEN you can worry about it... right?)