Funds belong to the building, not to the firm. Separate accounts, separate budgets and a clear position for each one is a regulatory expectation and the single biggest risk in the business if handled loosely.
Arrears are a process, not an event. Reminders at fixed intervals with escalation recorded is what keeps a building solvent, and it is the first thing to slip when a manager is dealing with a burst pipe.
Works need an audit trail. Quote, order, completion and invoice attached to the same job in the right building's accounts is what allows a treasurer to check a figure without a phone call.
The same four questions arrive every month: what do I owe, when is the next payment due, what is happening with the works, who do I call at the weekend. Answered once in a portal, they stop consuming the manager's day.