Home RJ45 wiring, should I run the cables myself?

Hello,

I recently moved into a house and I want to review the network wiring.

Currently, it's a point-to-point setup, meaning the box is in a room with three Ethernet sockets in the wall. I plug the box outputs into these three sockets and receive the signal in three other rooms.
So we have three cables going from the room with the box to distribute to the three bedrooms.

I had an electrician come to install a communication cabinet next to the electrical panel in order to comply with current standards and connect each room to this cabinet to distribute the network as I want.
This installation would be charged at €335 (it's a cabinet that does Ethernet and TV, I believe). That suits me just fine.

However, I start to frown when I see that the electrician is charging €80 per Ethernet socket to connect to the cabinet! Given that I already have the cables, conduits, and wall sockets, I find it expensive just to remove half of the cable (from the attic) and redirect it to the cabinet and do the wiring.

In my mind, the electrician would need to install the communication cabinet, redirect a conduit in the ceiling that would come out in the attic (entry point for all my RJ45 cables).
I would like him to create a new socket in a room that doesn’t have one, so that would be €80 normally.

Once this is done, all the complex installation is completed and I could connect my cables myself by taking my little legs to go to the attic, unscrewing the wall sockets, uncabling, and sending the cable back to the box, I plug in an RJ45 connector and it’s all done?
Are there any particular difficulties in passing my cables myself?
Does €80 per socket seem fair to you? Excessive? Too cheap?

The overall quote doesn’t shock me too much, I find that he has reasonable prices, and he’s a neighbor, which is always convenient ;)

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