Bus system / home installation, looking for advice, cost plan

I will also do it alone, and only install what really makes sense. For example, it makes no sense to control your oven remotely.

For example, it doesn't make sense to control your oven remotely

Yeah, there are many more or less crazy examples from manufacturers trying to make the topic appealing...

When I press the button in the kitchen in the morning, the light turns on, the coffee machine starts up, and the internet radio begins to fill the house with my favorite station... The blinds go up and the towel warmer in the bathroom switches to maximum...

But if I just want to turn on the light or skip the radio, it already gets difficult...

Likewise, motion detectors for lighting control in the stairwell... You can do it... but you’ll probably get annoyed more often than you think, especially if you have pets... and you probably won’t save electricity when considering the power consumption of the involved bus components...

Sensible things are automatic shading... retractable blinds during strong winds... automatic control of heating and controlled residential ventilation, detecting open windows... an "all off" switch at the door...

Many things are simply expensive gimmicks that cost electricity and can break...

here's my two cents on that:

Personally, I don't think much of EIB systems because I don't see their benefit.
"Simple" expandability always involves programming (which costs significantly more per hour than a normal electrician's hour).
For a new socket or switch, you still need the power supply line + bus line. So also more costs.

Just google "Siemens Logo" – it provides at least the same functions for much less cost.
It should just be installed centrally (e.g., in the meter box).
The cable routing must be adapted here, but you don't need bus lines for that.

Wuha ... I programmed PLC controls until I was sick of it during my studies You don't even want to hear my pain-er hourly rate

hehe a Logo is also just a PLC in mini format. However, I think the functions are more than enough for roller shutter control, lighting control, etc. If you then combine it with a nice touch panel or two, it's already a nice thing. (mein Geschmack !) And above all, a switch doesn't cost 100 € then

I personally don’t see the point of EIB systems because I don’t recognize their benefit.

---> Decentralized <--- that is the main advantage of EIP compared to a PLC solution.

"Easy" expandability here is always associated with programming. (which costs significantly more per hour than a normal electrician hour.)

Programming yourself? You have to do that with the PLC as well...

Just google "Siemens Logo," it offers at least the same performance for much less cost. It should just be installed centrally (e.g. in the meter box). The wiring has to be adjusted here, but you don’t need bus cables for that.

My main pain with such solutions: if the PLC dies, then nothing works for you! No lights, no shutters, etc.... How long does such a PLC last under continuous use? It can last 10 years... it can die after 5... or after 15... will you still get suitable replacements then?

If a participant dies in EIP, then all the others continue to work without errors...