It doesn’t make much difference here but was your plan registered before 1975?
Have AGMs been held annually and minutes circulated and posted on the noticeboard? Apparently there are no committee minutes. Without committee minutes, how do you know who the secretary is? Ditto the chairperson.
Have accounts been circulated annually? Are there separate admin and capex accounts? What is the manager costing you?
Had you thought of including a motion to terminate the manager? Get a quote from a large firm but perhaps not one that’s been in the news lately.