What Is The Best Multi Room Music System? Sonos or something cheaper?

The top 5 ways to play the same music in more than one room from the same source. Like Sonos but cheaper.
Chapters
00:00 Multi Room Music Explained
00:45 Alexa Multi Room Pros and Cons
03:10 Chromecast Multi Room Pros and Cons
04:56 Airplay Multi Room Pros and Cons
06:25 Linkplay Multi Room Pros and Cons
07:27 Sonos Multi Room Pros and Cons
08:12 Multi Room Music Recommendations.

Product Links
Amazon Echo Dot
https://www.amazon.com/All-New-releas...

Wiim Pro WiFi Streamer (Supports Linkplay, Airplay 2 or Chromecast Multi Room)
https://www.amazon.com/WiiM-Pro-Chrom...

Sonos Era100 WiFi Speaker (Supports Sonos, Airplay 2, or Alexa Multi Room)
https://www.amazon.com/Sonos-Era-100-...

Audio Pro A10 WiFi Speaker (Supports Linkplay or Airplay 2 multi Room)
https://www.amazon.com/Audio-Pro-Mult...