Saying "They don't have a microphone" is flat wrong. Everyone has one - that's how we can talk in Zoom. They MAY NOT have a phone - but every single band hall has at least one phone and/or microphone in it that can be used. No one technically needs to spend a dime.
Now - "they don't have a good-quality microphone" is a different discussion - but I don't think quality of the microphone will make or break anyone making region or state this year. Either a kid can play the music or they can't.