Welcome to the forum. If you could please change your alias to your real, full name, you would make the forum gods very happy, as outline in the forum rules.
As for your post, I am reminded of a Drew Cary episode when an employee came to him complaining that he didn't like his job. His reply was "We have a support group for that. It's called "Everyone" and we meet at the bar."
My first bit of advice would be that most common church goers don't have the vision to grasp the importance of AV. So you can enlighten them in one of two ways. Get them to visit other like sized churches that are doing AV well and have them meet with those who know what they spent, or start pushing the use of AV in every service, doing it right now matter how inconvenient it makes it for everyone else. The secret to that approach is to smile and be sympathetic and don't offer permanent solutions until they ask. Make it their idea.
Ronald Regan said "There is nothing you can't accomplish if you don't mind someone else getting the credit". I think he was talking about churches.
Hang in there.