Rita, it's great that you want to start a cafe (with quality coffee) at your church. I'm still trying to get my church to drop the nasty industrial grade coffee they like to serve. I am starting with small steps and serving premium coffee at our young adult gatherings. An espresso bar would be a welcomed next step!
As much as I love the authenticity of a semi-auto/auto machine (the kind that you grind the coffee yourself, load into the portafilter, dump it, etc), you may want to consider a super-auto machine that does it all for you. That way, anybody can actually pull a shot from it. It's just a matter of pressing the button. With that said, if you can be there or if you can train a few key volunteers to pull shots like a pro, go for the gusto and get something like that Nuova Simonelli that Matthew recommended. It will make much better espresso drinks.
I look forward to reading about your progress and also how that affects the atmosphere of your place of worship.