Time saving between trades

So maybe I am misunderstanding it, but isn't it about the time between ordering windows and their installation? During that time, I would at most prepare electrical and plumbing (chasing, etc.) But before the shell construction is lockable, I wouldn't install anything and, moreover, wouldn't leave any equipment on the construction site. Also, the "classic hiding place" for the key to the construction site door in the construction power box is not recommended. In our construction area of 10 sites, there have been two break-ins/thefts. Once, the key was left in the construction power box. At our shell construction (I didn't even count that), two empty cases of beer were even taken.

do you want to do it yourself or have it done?
yourself: sure, look for the right stones and order them if you have space to store them
have it done: sure, if you don’t have a company yet, it probably won’t work at such short notice anyway

so definitely, so that when the muddy weather starts, the mess in front of the house is smaller.

So great to get tips from you all.
I will sit down at the computer today and look for some landscapers and talk to them.
Maybe the neighbor can also recommend his "handyman."

I think mid/end of October (then maybe the scaffolding will be gone) would be a very good time.

So maybe I’m misunderstanding, isn’t it about the time between ordering the windows and their installation? During that time, I would at most prepare electrical and plumbing (chasing etc.) But before the shell is lockable, I wouldn’t install anything and moreover wouldn’t leave any equipment on the construction site. Also, the "classic hiding spot" for the key to the site door in the construction power box is not advisable. In our construction area with 10 sites, there were two break-ins/thefts. Once the key was left in the construction power box. At our shell construction (I didn’t even count that) two empty boxes of beer were even taken.

No, you understood that correctly. Primarily, it was about the period between ordering the windows (delivery time) and the installation. No, I am aware of that. Cables etc. only go in once the building is weatherproof including door/window/roof. Basically, I also found the tips from Müllerin and Grillhendl very fitting, because that is coming up for us too.

Sometimes I have the feeling that for many, the house construction is finished with the house itself and the outdoor facilities are not on their radar at all.

When you can lock the final front door for the first time, it is a moment that many builders celebrate with a brief pause – and afterwards you simply don’t get out of the chair again (or have to sit down at the desk to report defects on time) – in both cases to the detriment of the exterior finish (but often, where the plane finally came to a stop, the runway was already financially at its end).