Jetgraphics,
here in Oz it is frond upon to use an arranger for church in general, as most "want " you to play a piano styled keyboard ( stage piano) with hammer action keys. If you don't you are not using a real piano ( and that comes from the worship and senior pastors plus others) and in several churches. That being said, I find that it is the person who plays and their heart that shows what can be done with what you have, whatever that is.

The cheapest way could be to get a cheap midi keyboard (even new) hook it up to a laptop with One man band software or a Mac( if you already have one) with Mainstage ($50) and learn to use that. It is not all things, but it will give you great sounds and a base line to start with. Then get someone else in to help and teach them to do the same thing, share the joy; help each other.
When others join in, and they will, guitar, drums etc, then the band will form and the music will fill the church. Hey, even Jesus started with one disciple at a time, didn't He?
You should be able to run your midi files through this setup with some success and have most of your songs prearranged, till you get more confident at what you are doing.




Allan

Then there's Sharay Reed + drummer = Joy to the World
(Who needs a keyboard?)
https://www.youtube.com/watch?v=pATcvr3zAhg

If I can find a bass style that mimics him - - - whoa.

Sharay Reid is truly awesome but if you listen carefully there is a keyboard player/organist holding the chords for the song . There is almost always a keyboard player in gospel music and it does not matter whether you use a keyboard , piano or organ . All the worshipers care about is the sound and environment you can assist in creating by appropriate and sensitive musicianship .

That's a great bassist, but where do you find one of them when you need one lol. Anyway, they are NOT singing the song, just jiving and grooving away, no worshipping.