The Leopold church property has ample room, and more than is required parking. A useful adjunct to the Op Shop would be a community garden. Community gardens are found in many places, often as part of schools, and provide for a gathering place for members of the community who do not have land on which to grow their own gardens.
Rather than explaining here what I mean by a community garden, visit these websites for a start:
https://communitygarden.org.au/
www.foodwise.com.au/the-community-gardening-movement/
ceres.org.au/about/community-groups/community-gardens/
https://www.geelongaustralia.com.au/communitygardens/article/item/8cdd4919a3966ac.aspx
https://en.wikipedia.org/wiki/Community_gardening
There is s bit of investment required for fencing, water, etc., but it does not require much work from church volunteers, and has the advantage of being a visible sign of the church in the community.