Thanks all.

Added the rivets onto the living quarters wall and some smaller ones for the various panels on the building.

I decided on a sliding door for the gate.

It works at the moment. Hopefully it will work after painting as well. I will paint the pieces separately.
I needed a 17 cm long ladder for the Lookout/comms tower, so I made one.

I have these wood blocks, and two of them together have the perfect size for a ladder.
Masking tape helped to keep them together and I could mark the steps on the tape.

The sides of the ladder are L-shape profiles which are secured to the blocks with masking tape.
The steps are half-rods cut to size.

The finished ladder is secured to the tower with some small nails and plastic tubes help keeping an even distance.

The "front" of the build at the moment.