I know nothing about speakers setups. I just wanted to know the easiest/cheapest way to go about install 4 speakers in my room. I want 1 Bluetooth speaker in each corner (plugged into to wall or micro USB chargable). Just whenever I'm on YouTube on my phone or computer, I can tap on the airplay button and the audio will play from all 4 speakers and I can tap again to switch back to my phone/computer audio. I have one speaker I can do this with, I just want 3 more and I don't want to have to worry about synchronization between all of them. Do I need to get a google home or amazon Alexa to pair all the speakers up? I have around $50-$100 budget and don't care for top sound quality at all, just synchronization.