Treat the wall next to the interior stairs due to the enormous height up to the attic ceiling?

Hello,

what is the best way to work on the wall next to the indoor staircase (1/4 turn)? Currently, the construction staircase is still in place. From the ground floor to the ceiling of the top floor is at least 5 meters. The indoor staircase is installed, a built-in wooden stringer staircase, so you can hardly work behind the stringer. If you do something beforehand, there is a risk that the tradespeople won't be careful and damage the wall. I'm more concerned about the height of the wall. I can hardly imagine a scaffold because the construction staircase is in the way. Maybe someone has just recently dealt with this issue and can share possibilities.

In the picture the left wall, or actually the wall that will get drywall panels in the upper area.

Thanks!

The painter came early and prepared the wall accordingly. Of course, a bunch of dents appeared, but they can easily be repaired later. Regarding height, ladders are simply used. There are also so-called step ladders, which – as the name suggests – are for stairs.