有些时候，和租客交谈几句，我就能够感觉到他们是否nice和可靠。。。我觉得第一感觉有时

比credit  checking还重要。

Anyway, ask them to provide the proof of monthly income. Also, check the eviction history and credit history.  Based on the above info, you should be able to make the decision by yourselve.