Installation of satellite dish on the roof

are you my electrician? your list is correct

I don't think so

Sounds realistic.
Summarized, what is needed overall to make it work?

- Satellite dish
- 4-output LNB
- Mast
- Tile with feed-through
- Rafter bracket
- If no cold roof: feed-through through the insulation/sealing layer
- Multiswitch for 8 participants
- Power connection for multiswitch
- Connection CU 10mm^2 single wire for connection to equipotential bonding
- Cabling SAT cable in 6 rooms
- 6 simple SAT sockets flush-mounted
- Alignment of the system

[*]On roofs insulated according to the Energy Saving Ordinance, masts are out; the rafter bracket is completely sufficient for a satellite antenna.

[*]State of the art are receiver-powered multiswitches.
[*]Since DIN 57855-1 (VDE 0855-1):1984-05, grounding conductors of at least 16 mm² Cu, 25 mm² aluminum, or 50 mm² steel/tin-zinc are required, 10 mm² Cu used to be standard.

[*]According to DIN EN 60728-11 (VDE 0855-1):2011-06, the system must be incorporated into the protective equipotential bonding so that the equipotential bonding on all cables remains even when the MS is removed, which requires earth blocks or earth angles.
[*]According to DIN 18015, I&C and R&C cables must be laid in empty conduits.
[*]According to this standard, multiswitches should be installed in central communication distributors.

[*]A chain is only as strong as its weakest link; the connection of the grounding conductor to the rafter bracket and the clamps of the main earthing bar must be certified according to test standard class H = 100 kA, which is known to only a few installers.
[*]Grounding conductors should be routed without hazardous proximity to other cables, which usually requires an external down conductor.

Examples of code-compliant implementations:

Grin you are everywhere too.

Grins you are everywhere too.

Pure coincidence that I, as an occasional visitor, replied fairly promptly.

So the connection cables will then be available from every room in the attic? Right?
I had a roof tile installed for the pole of the satellite dish (that cost about 50 euros), then I ordered the matching pole from the electrician (about 180 euros), a satellite dish with LNB (50 euros), and I had it mounted and adjusted during several electrical jobs.
A little coaxial cable added (let's generously estimate 50 euros).
So material costs 330 euros.
Plus some working time for the electrician.
All in all, that is far from your price.

Edit: my price indications are roughly correct... it was some time ago.

So the connection cables will then be available from every room in the attic, right?

If, contrary to the specifications of DIN 18015, one opts for the cheaper variant with a multiswitch in the attic instead of the central communication distributor in the basement, naturally the star lines from a multiswitch or switchable LNB must end there – pardon – start there.

... then I ordered the appropriate rod from the electrician (about 180 euros)

By a "rod" I understand a mast, which at that price would have to be gold-plated, even with mast foot and mast clamp. On a new building with an energy saving regulation roof, megaout and roof rafter holders are state of the art.

... a satellite dish with LNB (50 euros) and I had it installed and adjusted during several electrical works.

A satellite antenna with LNB for 50 € I classify as electronic scrap, disregarding stability.

A little coaxial cable as well (let’s generously calculate 50 euros).

Good full copper cables cost about €0.90, cheap cables with break-prone and intermodulation-susceptible aluminum shielding and possibly Staku inner conductor cost about half.

So material 330 euros. Plus some working time for the electrician.

Not realized despite foils that according to IEC 60728-11 grounding and equipotential bonding are required? You don’t get those for free.

I understand an offer differently than:
6 connections optionally for TV, telephone, or network installed ready-to-plug in the room.

The building description only says the following

OT: I would google who is allowed to lay foundation earth electrodes, there might still be a nasty surprise lurking there.