I do not use it in the same room. I mostly use my Kodi as radio. Therefor I use a Bluetooth speaker in the kitchen and in the garden. In such a case an Echo is not important. TV is only a third prioirity. (second is the tv as Diashow)
Is possible to use two bluetooth speakers at the same time? Don't know if the bluetooth is capable for such a thing.
I'm using internet radio in the garden too, for this I have a simple solution, an old smart-phone without sim, without account, only wifi and an app for music (with ability to play net stream - ex. AIMP - android). I like to find new purpose for old smart-phones, another one is used as a perfect desk clock...