Let me educate you guys a little
Why do I need to know the denomination?
Every church has different music and style. A 100 member Catholic Church will not need the same setup an African American Pentecostal Church.
Why do I need to know the average membership or attendants?
It gives me an idea as to how big the church is and their audio needs. How many bodies are in there makes differance. People make noise and adsorbe sound. Has nothing to do with potential customers.
Why do I need to know dominations?
Will that’s pretty simple. I would prefer a CAD file but if he's shopping tomorrow no time to do an EASE model of the church. As seen here
http://www.renkus-heinz.com/ease/index.html
Why the number of Choir members and instruments?
If they only have 5 than they don't need choir mics. If they have 30 than they do.
Why does the music style matter?
At my moms church its a piano and 3 singers. At my Church we have keyboards, Drums, Bass, Lead, Organ and a 45-member choir. A traditional church like my moms would have no need for dual 18s and my church has 2 dual 18s. Some churches these days are like going to a rock concert.
There are a lot of other factors to take into account. Those are just basic interview questions that have to be asked to get a foundation? After about 100 installs I can get pretty close as to what they need from an experience by asking the right questions. I can assure you that Joe blow at the local music store want ask those basic questions.
After talking the Jeremy I just finish doing an install in a church about the same size and setup. I found this out by asking a few question like the ones above. I was able to point him in the right direction and give him so ideas.