This is a really great idea Brendan! I'm in :) , I just wanna say anyone who didn't had a mic, they don't need to buy a Neuman or any other high price Microphone brands, even with cheap mics they can record, and I am sure that when someone can buy an instrument :))) then they can buy a cheap mic easier, but they have to be sure that their mic is condenser to have a better quality

Here is a cheap Mic with a good quality and low budget (50$) :

----^-----
The Good thing about that mic in the video is that it's USB and you don't need to buy a Soundcard for it!

and I also found a link to Amazon :
https://www.amazon.com/BC-Master-Microphone-condenser-microphone/dp/B072HJ1683/ref=sr_1_73_sspa?ie=UTF8&qid=1515908136&sr=8-73-spons&keywords=microphone&psc=1

I think a 50$ mic is not much and If anyone couldn't buy a mic, they can also find a studio with low price and record for 30 min and then its done :)

and if there was no other way, you can record with your devices and see which one has not much noise and doing it with that. the noises in music filling the track and I also can cut off some of those noises but it also will shape the sound of your instruments so its better to buy a cheap and good mic :)))

peace!!