For the person doing the persuading
Bring your board a one-pager.
You found this. Now you have to get four other volunteers to agree, at a meeting, probably weeks from now. Put your community's name and size in below and we will make you a single clean sheet to print and put in front of them: what it does, what it costs you, and straight answers to the questions your board will actually ask.
Free, no account, nothing to sign up for. It opens straight away.