分析什么地方最花时间： 是leasing, 维修，collecting rent, communication?
再看看第1，第2花时间的，分析如何reduce steps or streamline process.
If communication, set up multiple phone numbers: One phone number for one service:
For example, number A for leasing; number B for fixing stuff, number C for collection rent. Hopefully it reduces communication time.
Then numbers communication can be automatically sent for bookkeeping.
