Time expenditure for own services

And that as an IT specialist?

I would also keep my hands off the electrical work. If something goes wrong, I don't want to argue with the insurance.

There are IT specialists and masterminds

I would definitely agree that you shouldn't approach this without any knowledge. I also wouldn't trust myself without the professionals in the background. But do you think the insurance will tear open the walls, take fingerprints off the wires, and not pay if there are no prints from the electrician on them?

Malicious tongues claim that some masterminds do not place much value on the special requirements for IT cabling (bending radii, kinks, shielding leading up to the terminal). I am an IT professional and have already connected about 200 outlets. 3 minutes are possible for the pure connection (from stripping the insulation to clamping), even if you do it properly. But it certainly also depends on the appropriate tool. And there is definitely no preparation or follow-up time included