How to create a scaffholding for this Buoy

in this house i have already attached it to the wall, but i have to move this buoy to another house where walls are made with tuff so it wont sustain my weight if i sit in it.

how can i make a scaffholding to sustain the buoy and me inside of it?

in this house i have already attached it to the wall, but i have to move this buoy to another house where walls are made with tuff so it wont sustain my weight if i sit in it.

how can i make a scaffholding to sustain the buoy and me inside of it?