Hi there i hope someone can help

We have been with the current fibre company for a good while on their 1000mpbs package the router for that is a deco BE9300.

Because my pc is upstairs in the back room and the fibre had to be installed downstairs in the front of the house i was getting only 200 speed via wifi on my PC so i paid a bit extra to them for a extra BE900 to create a mesh so i could have it on my desk and connect to my pc via ethernet which actually gives me over the 1040 speed often same upload as we get the same upload as download with them.

Now they sent me a offer for their 2000 speed for the same price i am paying now which i had been wanting but this is without the mesh so i said i will upgrade to that speed and i will then buy my own extra Tp-link for the mesh as it works out cheaper overall than paying them the extra each month.

they said the router i will be getting for the 2000 package will be the 810 so i presume its the HB810 (BE19000)

so here is the question..... what is the cheapest deco option for the mesh so i can get the 2000 speed via ethernet like i did with the 1000 speed

will the cheaper smaller TP-Link Deco BE25 BE3600Mbps work as the ethernet port on that says 2.5gbps

also my motherboards Ethernet is good for full 1000 speed but may not be great for the 2000 speed so thinking of getting the BrosTrend 5 Gigabit PCIe Network Card