Is 7 feet way from wifi access point (ceiling) to stereo risky for noise?

@dman777 Every situation is different. You will have to experiment to find the physical and electrical environment that is the least noisy. There will always be noise. Minimizing it is the best you can do.

@dman777 I installed a Unifi gateway router with a UAP-HD-AC access point in the hall ceiling outside my listening room.  It worked very well until my audio ocd kicked in and I ran ethernet from the switch by the router to the room.  The Unifi system has worked very well in my house, though the access point is probably a little long in the tooth as far as IT progress has moved.  I have always run the Access point with POE from my Unifi switch that resides next to the Gateway router.  I also have another switch present on my rack.  I see no issues with the access point being 7 feet from your system.  

My streamer is about ten feet away from my router. I use ethernet to connect due to its proximity. I tend to use cables vs WIFI whenever possible due to my spread out mid-century ranch and the aluminum siding. Add AT&T's terrible native WIFI and signal loss. I have mesh units all over the house.

Buy a good linear power supply for router  like a LTA 

AND A good ethernet hub  lots of noise from these two points

a direct connection far better then wifi for music.

Use a mesh system or Wi-Fi extender along with a good Ethernet cable to create a wired connection, and turn off the wireless networking on your streamer. The sound is noticeably better and darker.