Maintenance expense different from estimate -Quadruplex

[Juhi Banerjee]

I am thinking of buying a quadruplex built in 1980 and I am estimating $80 per unit per month as maintenance expense and $80 per unit per month as capex. It is relatively well maintained and owner changed the roof in 2011 and water heater in 2020. My agent send me the finance statement from the property management company who is managing the property for last full year and the maintenance expenses is way less than what I am projecting. They are estimating $1300 for quadruplex which comes to $27 per unit for maintenance expenses. The property company is managing 4 such quadruplexes built side by side. Is it possible that there are economies of scale which I am not aware of where the expense is nearly 3 times less than what I am estimating. Also, the owner is only sharing finances of single year.