I’d split the comparison into recurring costs and irregular work. Recurring: insurance, energy, routine maintenance and any management or shared-building charge. Irregular: roof, windows, exterior fabric, communal systems and damage associated with exposure. Then ask who chooses the contractor...
And don’t treat renovation as one number. Split urgent work, optional improvements and recurring maintenance. Coastal exposure may affect the questions you ask about a particular building, but the condition and construction of the actual property still matter more than a general assumption.