Need help choosing a new routing setup.

[Stewball32]

First time posting here, sorry if I'm breaking any rules...

 

My current router is looking likes it's no longer up to the task of my house. I feel like I know enough about networking to be dangerous, but I have know idea what hardware to get to solve my problems.

 

I'm in a 2 story/3 bedroom house with 2 family members, one of them with an alzhiemers type illness (semi important later)

 

What's currently on my network.

-My Gaming desktop which needs low latency, but unfortunately is in a location where ethernet is currently not an option, so it has a PCIe wifi card.

-Gaming laptop that runs when a friend comes over.

-NAS that hosts a plex server.

-A work destop that has light/medium web surfing.

-two smart tvs that can run Netflix/Plex.

-4 wifi(2.4Ghz) security cameras that constant write on the NAS.

 

I believe that the biggest strain is the 4 Cameras that have pretty much killed the 2.4 Ghz connection. I've added them because of a family member with "alzhiemers" tends to not remember details or embelishes them. He has many caregivers/therapists come to help him, and he tends to accuse them of doing things. Most have been proven blatently false thanks to the cameras, but one acusation was proven very much true, thanks to the cameras. I don't really have a way to run an ethernet cable from the current router to where they are set up, and the cameras only have a 2.4Ghz connection.

 

My thought was to create a Mesh Network with Google Wifi, and use the domes to connect ethernet connections to the cameras, but I'm afraid of my gaming setup taking a huge hit, and if I have domes too close that could cause other problems.

 

Sorry for the wall of text. Any help would be great.