What exactly is included in “after reserves”? With a serviced apartment I would want separate lines for vacancy, management, cleaning or turnover costs, maintenance, insurance, property tax and any building charges. A €253 deficit can become much larger if €4,430 assumes near-continuous...
Before committing to a viewing, I would ask for the current service-charge amount and what it includes. Also useful: whether any building expenditure is already being discussed, and which title or ownership documents will be available for inspection. Those answers help distinguish costs attached...
Getting field ownership wrong can leave you with clean-looking records that are quietly unreliable. Two-way syncing is tempting, especially where staff already correct details in several places, but competing edits may create more risk than a controlled one-way flow.
I would assign one system...