We have a stand of 6 - 8 100 foot DF tress about 20 feet from our
house.

We've thought about "topping" them but wonder if that is wise. Also a
friend recommended we take the limbs off to about 20 feet above ground
to give us the more of the afternoon sun. Our area is usually cloudly
and wet, seattle area.

At present, an arboist is too expensive.

Any ideas or books that might help

Thanks