That's really exciting! Glad to hear about your friend Ernest too. The testing situation is a mess; you can bet that he was infected.

I'm not a virologist. But I'm pretty sure this thing is being spread by people breathing, talking, laughing, etc. Many of them don't even know they have it.

Indoor environments are risky, because aspirated virus can linger for a long time. Outside it should be diluted by fresh air, but I would make your personal safe zone at least 15 feet. Someone compared the virus breathed out by others to cigarette smoke. We don't allow smoking within 25 feet of our building entrance, so give yourself a buffer!

Not sure what to tell you about requests and tips. Maybe use PayPal for family & friends with the name of the song as the subject? Make a poster, or write your PayPal ID on a white board near the door (not near you!) Overall a positive development!