Hi,
I would use a HK Audio Elias, aktive with processor and multibandcompressor (2 subwoofers, 2 tops, 2 additional amps for monitor systems.
I would take a mixer with more than 15 channel. Important tuneable mids, helpful a built in graphic EQ.
The keyboard players needs own monitors. JBL control one equipped with a amp may be good for this.
I would not pick up drums in smaller locations. The producer of hearing aid will not pay you for damaging audince's ears.
For pick up electric guitars (not steel string acoustic) you can use a special DI box with speaker simulation (Red box sounds great). Acoustic guitars needs a compressor to make the tone better audible.
I would use 4 monitors for the band, maybe the same mixdown as for PA with a little voice up.
In smaller churches the Drummer may use brushes or unplugged sticks (a kind of wood brushes).
Feel free to E mail me.

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Regards
RF