空置率以及平均租金
http://www.cmhc-schl.gc.ca/en/corp/
和地税资料
In Ontario,
www.mpac.ca for the property assessment, then check the local government for the tax rate. usually you can get it from the seller agent.
如何找到一个城市的历史平均资料?
you can get all information for the housing market from
http://www.cmhc-schl.gc.ca/en/corp/ , some are not free.
如何找到一个公司代管出租??
Yellow page, phone directory. You can ask your real estate brokerage/agent, your lawyer or anyone to do it for you.