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:
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.