I suggest following the letter of the law and create a written policy, procedure and checklist for dealing with eviction timelines and tenants possessions consistent with local judges' interpretation of the law. 

This means that a disabled tenant can expect the landlord to adjust rules, procedures, or services to a reasonable degree in order to provide an equal opportunity to use and enjoy her dwelling unit or a common space.

I don't know OR law, but make sure you do the move-out by the book, including any notices that are supposed to include the law regarding their rights, any pre-move-out inspection procedures, etc., etc.  

@Steve BabiakIf I remember correctly of the 67 counties in PA only two don't have Tax Claim, those being Philadelphia and Allegheny (Pittsburgh).Procedures, rules and regs in the other 65 counties are all govern by the Tax Sale code, though there are differences between the counties.

In a KAIZEN for a manufacturing process for example, (sorry for nerding out here), a process/work flow is studied to determine areas of waste and in turn develop a procedure and/or work instruction for the job function in an effort to shorten lead times. 

Accounts unpaid are subject to eviction procedures and additional late fees.All maintenance items need to be made in writing.

As a proeprty owner in CA The procedure it not hard and is described well by @David G.

Disclaimer: The solution may differ on how your process, procedures, software and accounts are set up.

Whatever your policies and procedures are you need to stick with them.

Also, there are also a lot of young Doctors ( read medical/dental residents) who often move out of state  just for the duration of their residency.