We have three buildings and a dock spread out over a few acres. For that, I tend to like one router and multiple access points, and moved away from consumer grade to prosumer/enterprise gear. I was a Peplink fan but am less enamored with them of late, but that's primarily because I don't care for their marketing dept's recent actions wrt their forum, etc. Their gear remains solid, but it's largely designed around the needs of those who need a mobile backup, which was our original need given our remote location. If you have gigabit internet coming in and no need of mobile backup, I think there are likely equal or even better options. My IT consultant likes Ubiquiti (the Dream Machine Pro for the router), as do some others here. Prior to going the Peplink route I did use the Asus mesh to connect two buildings and it worked reasonably well, but I would have to reboot once every month or so to keep it working between the two buildings, and the two units were in line of sight of each other.
I do have a couple of friends who have used Google's wifi mesh or Orbi mesh, and they seemed happy, but are more recently reporting problems that sound like overloaded wifi to me. All in all, if you can run ethernet to some distant points, I'd go with one router and hardwired APs connected to it.