Have any special levies been raised in the last 24 months?
A special levy is the strongest signal that the building has had an unbudgeted shock - capital works failure, insurance claim, legal cost, structural defect. It also indicates how the strata committee handles surprise expenses.
Look for AGM/EGM minutes that authorised a special levy, the amount per unit entitlement, and the works the levy funded.
Multiple special levies in 24 months, or a single levy exceeding the annual administration fund - both indicate a scheme operating without enough reserve.