Interior finishing by self-work (electrical installation) feasible?

For the electrical installation you definitely need a master electrician for the meter replacement application and the acceptance.
-->That is available.

Otherwise your plan fits. Possibly before the screed installer still install empty conduits in the floor if cables are to run there.

Is it supposed to go towards smart home?
If yes, which system do you have in mind?
-->Was originally not planned. However, a friend has now installed Loxone and it looks interesting. I am currently informing myself in that direction.

One more personal question:
For which company do you work [emoji4]

So electrical installation in peace could become exciting, if empty conduits are to go into the ceiling, you have to whatever. If you can/want to put everything on the raw subfloor that probably works already, but even there you have the dependency on the screed and plasterer. Interior plaster usually comes before the screed, right?
So with us, electricians, HVAC, plumbing are sometimes there at the same time, which is very practical because then they talk to each other and can find solutions. But that doesn’t mean doing electrical installation alone wouldn’t work. From what I remember, some have done it here already. You can definitely save a lot of money. Under your conditions, I would really treat myself to a bus system, preferably KNX, because then you almost only pay the delta in material. Man, how much money I could save there... [emoji6]

Our shell contractor wanted (and got) to do the piping on the filigree slab "immediately." Twice he managed to get the filigree slab in before the weekend; the last slab, into which luckily not as much had to go, came on a Tuesday noon and we were ready from early afternoon.

It was already mentioned that usually the screed comes after the plaster. But after plaster and before screed, the underfloor heating must also be installed. Also, you could wreck anyone’s schedule of your general contractor if electrical installation in the finished shell and plasterer keep getting pushed back. --> Good point, thanks

I therefore don’t see "few" interfaces to a general contractor, but expressly through electrical installation and plastering even two important milestones that depend on you.

Then the following questions remain:
- who installs the other floors? if by the general contractor (which I don’t believe) that also depends on the screed --> Not the GC, will be subcontracted individually.
- which staircase do you want? Build-up heights must be well planned and it must be clarified whether/by whom there will be a construction staircase --> Wooden staircase; the construction staircase is a good hint, currently clarifying
- is there even a general contractor who will let so much be taken out? (We only spoke with one, they would have been okay with windows and doors, but not more) --> Is being clarified. There are different approaches. Some GCs currently prefer to do only the shell due to the personal share and the number of buildings --> Coordination of other trades yields low margin with high effort/risk.

--> Have you ever considered individual trade awarding?
--> Yes, we have considered it. But from professional experience I hesitate to rely on only one person (man or woman), namely the architect. From a construction point of view, I'm missing the background with single-family house construction to fully assess their work. A bill of quantities with gaps thus presents a risk we want to avoid.
In addition, we do not want to have to represent or clarify interfaces between, for example, carpenters and masons, which I cannot technically assess. And since there are ALWAYS challenges in every project, there will be points there.

--> possibly also with an extended shell (earthworks/ possibly cellar/ shell/ roof including roofing from one source)

Electrical quietly ... I don’t think anything about that is quiet.
If you want to go into the ceiling, you have to pull your pipes after the formwork and before the pouring, or after prefabricated elements and before pouring. But even if you lay on the floor and drill through the ceiling, everyone else waits on you. Screed insulation, underfloor heating, screed cannot be done before you are finished, and the plasterer won’t come if you haven’t set the boxes.
At least coordination on the installation must be with water and ventilation, if present and running under the screed.
--> Thanks for the hint about the screed. I had parallel just informed myself about it, as I feared it. That is the answer then.
That means if anything, you should better also take the screed in the package, but then you burden yourself with warranty risks related to the underfloor heating.

So dawdling isn’t an option if the whole project is not to be delayed.

The electrical stuff is really very tightly scheduled with many GCs. That means more or less spontaneously the cables have to be in the ceiling that day and then you have to deliver. Will your GC take the risk if you don’t deliver?

With our general contractor, we simply scheduled more time for the electrical work in the timeline beforehand, which wasn't a problem since the appointments with the tradespeople are made based on that. We were hardly ever behind schedule, and if we were, the general contractor handled it very flexibly.

I would definitely bring up the first point.

Regards