[Solved] Setting Up WiFi Network in 100m2 Apartment: New Router, Repeater, or Mesh Network?

Hi,
I am trying to solve a problem with WiFi network in my apartment (100m2). I have internet from Multimedia, 150mbps. The problem is that the main router from Multimedia is standing at the far end of the house (where it covers 1/3 of the apartment). I know that the best solution would be to pull the cables for the whole apartment, but I have the option of running the twisted-pair cable to one place, closer to the center of the apartment point (2) in the screengrab. In this new location I would set up a new router that would act as an AP (multimedia doesn't even give you the option to turn off Wifi operation, let alone turn off their modem and insert as Bridge mode...) and in addition, in the place where the coverage from the new router (2) won't reach, I would put a repeater (3) to complement the rest. In the attached drawing I show the layout of the apartment and the marked placement of the devices (map from Xiaomi vacuum cleaner, best illustrates the layout of the apartment ).

Question 1: What router to buy, so that it can cope with coverage of this entire apartment from place (2) ? Currently I connected there for testing an old Tp-Link WR1043ND, which even gives some coverage, which can be received at point (4) on the PC, but the speed on speedtest 4mbps does not knock
Question 2: For this router, if it can not fully cover the apartment, what repeater to buy, which would work well with the router?
Question 3: I have read a lot of pseudo reviews about Mesh networking, where they praise it to the skies, but here on the forum I read that it does not make sense. Let it go in this case, would it make sense to put something like this? (I would be able to buy a Tenda Nova MW6, about 600zl for a 3-pack)

If it's about the budget, these 600zl I would be able to spend for the whole set, but if it can be fixed with one router cheaper, it would be great
E: I found something like this, the question is how it works. https://www.x-kom.pl/p/363942-system-mesh-wi-...ifi-system-wall-plug-2200mb-s-a-b-g-n-ac.html

After my experience at home I see such a solution (general)
where possible, attach Ethernet
To this Ethernet connect AP or mesh unit, I have good experience with cAP cAP lite from Mikrotik
If you want to have high speeds, then buy devices on 5GHz, the downside of this band is less range than 2.4GHz, most often devices with 5GHz are dual-band

What about mesh, I see one problem - he uses radio to transmit packets between devices, so cable will always be better.
In your case I would add a cAP in point 2 and possibly some repeater.

Greetings
Paul.

Radiolinks, repeaters and "mesh" for 600zł will somehow "work". If you want to do it by radio and so that it works and not "work", then unfortunately but you need one zero more in the budget. The best way, unfortunately, is to wire and put AP. Then 600zł will indeed be enough. Play around a bit, maybe under the slats, maybe on the ceiling under the coffers carry out?

Mesh flips the signal by radio from one point to another - that's its nature, so the points have to "see" each other by radio.
PLC will be nice, provided you don't have latency requirements - it strongly depends on the "electrical" conditions in the house, but sometimes PLC throws in a lot of latency - most likely due to retransmissions.
If you live in a block of flats, a lot of neighbors also have 2.4GHz WiFi and your ether is crowded. 5GHz is empty for the time being and works much faster than 2.4GHz, so that's why I urge you to get a dualband AP - despite the shorter range, you'll have a faster connection. If your home devices support WiFi 802.11ac on 5GHz, then don't hesitate and take dualbands. Virtually every mesh is dual-band , so if you're going for a solution of this type, 5GHz you should have "in the package"
As I wrote before, pull in an Ethernet cable where you can, and put the AP or mesh over Ethernet.
- I don't know exactly mesh solutions, but they should also work over Ethernet links.

Greetings
Paul.

Thank you all for your help, I will try to somehow figure out more cables at home, however, I still don't know if I'll be able to do it.
One thing just bothers me, because if I decide to go for Mesh, in which the set will be a router + wireless satellite. If I connect this router to my existing Multimedia router, which gives DHCP, etc., will this mesh work properly? Is it possible to set the mesh router to act as an AP?

Ask your Kesha dealer, or see the manual. It should be possible to disable the DHCP server in the country and put it in bridge mode, but check before you spend the money.

Greetings
Paul.

You insisted on this mesh. What is it supposed to give you, since the APs will be connected by wire anyway and the whole mesh will be off? I guess Google and its ads (or sponsored articles) are brainwashing you. In your case it is rather more important that the APs support high-speed roaming.

I purchased the Deco M4 kit and am very satisfied.