Waldemar,
The homeowner wants the colony dead/removed NOW.

What I would do. I doubt there is another beekeeper interested in the
project. I doubt an exterminator is interested so you are in control
Waldemar and *not* the homeowner. Decide on a course of action which will
save the bees and tell the homeowner to take it or leave it.

What could the bees be possibly hurting 30 feet
 high in a tree?

 Why not suggest the homeowner move and let a bee friendly person which
appreciates bees move into the house ? Kidding!

The only plan which seems reasonable is the screen funnel/ outside nuc plan
to remove the bees.

Be sure and tell the homeowner the expected rental cost of the boom truck.

 Enlarging the hole to hand size would seem necessary to remove comb but
maybe others have got a few suggestions.

Have you told the homeowner of the charges for the project yet? Might make
the homeowner reconsider removing the bees from their happy home.

Bob

Ps. At times in spring I keep close to a hundred hives in my back yard.
What's the fuss over one hive of honeybees thirty feet high in a bee tree?

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