Thank you everyone for your feedback. Of course, I goofed and forgot to mention our own tech on a tech list. We use a simple Barix connection to bring audio the 100 feet from the worship service into the studio. Not automated, mixed live, service length varies.
I had wanted to try to automate at least the opening, and you all have given me ideas. If there is anyone running Rivendell AND doing a live church broadcast, kindly email me off list. I did try at one point to configure a switcher to aid in this process but it didn't work well; I have another switcher (BT 4.1 or 4.2) waiting in the wings when I decide to try again. Thanks!