Hi. I just subscribed to a new 600 Mbps broadband service and I am looking to replace my old Asus wifi router with a mesh router. I am looking at the TP-Link BE25 mesh router but I am wondering should I go with a single BE25 mesh Wifi-7 router or the traditional type router (also Wifi-7). 

My questions are:

1) Is a single BE25 mesh router be enough to cover my whole apartment - 1400 sq feet with 3 bedrooms (with doors closed)? or should I go for the traditional router of similar price range?
2) I know that there shouldn't be a problem if I am at the living room (where I am planning put my router) but I am more worried about the bedrooms in which the doors (wooden with about 1 inch gap at the bottom of the doors) are usually closed. Will I be able to access a strong enough wifi signal (with door closed) for my laptop and PC?

Previously, I had an Asus Wifi 5 router (300 MBps connection from another broadband provider) and I had problem accessing the wifi from my 3rd bedroom, the furthest room from that router (about 40 feet away) when my door is closed.

Thanks and regards