Re: Hanging your artificial tree....
I’d suggest you use a piece of soft wire or clothesline, form/tie a loop under the branches close to the bottom of the tree, then run the wire/rope up along the trunk toward the top repeating the loop every 18 inches or so. (I’d say that 3 of those loops total should be about right...)
At the top of the tree you can run the wire/rope up as far as you want for a final loop to go around a hook or nail in the rafter.
If you’ve got a problem with wind you can add another piece of wire/rope from the base of the tree to the ground/deck.
(This would be more clear with a sketch, but I’m afraid that it’s a bit late in the day to dope out all the html games I’d have to play....)