I have always been a firm believer in keeping it simple, fun and engaged. Here are some ideas that you might find useful:
For the Property Managers:
They should always be focused on income, how to make more money and collect it.
For every % they are able to grow Net Rental Income when comparing year over year, the Property Manager would earn X. If the greatest growth is in the 1st qtr, there is a extra bonus. This will have them focusing on Q1 during Q3 and Q4.
For your Service Managers, provide them with a printout of what was purchased the year before and challenge them to locate the same parts or service for less. Then challenge them to purchase less of the items that were most purchased.
For example, our provider, HD Supply, provided us with a report showing everything we purchased in the last two years from them.
Our Service Manager quickly relazed that they were buying a lot of blinds and decided to learn how to repair them instead of replacing them. He was then given a bonus equal to 50% of savings realized in maintenance supplies. You will see how quickly the amount of overstock in the maintanance shop will drop by.
Johan