It costs money, time and effort to get rid of errant tenants.The property that you are considering buying - I'd suggest you encourage that tenant to leave if she appears to be unstable. 

If someone has a long track record of unstable financial history, them paying their rent for a year wouldn't really prove much for me.

Bottom line though is this; if an applicant goes through the application process, as landlords, are we legally bound to rent to someone who we know is mentally unstable? 

It really hasn't stopped an unstable tenant from moving in January.

Your occupation (contracting and restaurant work) are seasonal and in unstable industries.

If they are somewhat unstable, you may want to tweak this plan.

Some investors are unstable, but to blackball all sub2 investors is an over kill.

Makes some of the more unstable among us to take things into their own hands.

The reason is simple: Asian economies have been quite unstable over the last few years and the currency issues is another factor driving them towards more stable markets.

Secondary markets are on very unstable footing, so it is much harder to get money now, but banks still have to lend to make money, and really do need to dilute the low yield paper they currently are sitting on.