Small Multi Family Expenses

[Marcel Pean]

When estimating expenses for a small multi family property (2-4 units), I understand that some expenses can be found just by asking utility companies, property managers and other investors. However, is there $ amount or a % amount that you use to estimate vacancy, cap ex and property management (assuming you are managing the property yourself)? And does it vary based on your market? What is a good estimate amount to use?

Thanks in advance!