Electroinstallation too expensive - oversized or too expensive?

Vacuum cleaner plus a few other consumers, such as waterbed heating etc.

But you don't vacuum for several hours.

And a music system has a pulse load. You can neglect that.
Your ears will ring more than the cables in the wall.

We already had this topic here - 2000 watt sound system != electrical consumption

My not exactly small Pioneer draws something around 150 watts, my TV a maximum of 400 watts - there is still a lot of room up to 3600 watts.

Just kidding. Surely you don’t have 2000 watts of music power in the living room *lol*

We already had a 40kg PA amplifier with 2 large 2x15" bandpass horns running in the living room, apart from the amplifier clipping there was no problem. And that must have delivered around 3000W RMS.

So no problem at all

What do you use to heat your waterbed? Ours needs 240W at full power. Vacuum cleaner 1000W maximum. So there is still a lot of room for improvement