Simple. surfboard tie down straps.
wrap your tree in a throwaway tree bag to prevent treesap on roof
Open doors & strap tree to roof.
Bam! Done.
OCEANBROAD Kayak Tie Down Strap 1.5 Inch 16 Feet 2 Pack Cam Buckle Straps for Surfboard SUP Board Kayak Canoe https://a.co/d/0GvXErl