Everyday people die, people lose their jobs, people get sick, people get divorced, people file for bankruptcy etc.

And i would also file a 3 day noticeTo pay or quit, regardless if the courts are open and accepting eviction notices.

You have to be ok with different liquidation outcomes.For example, if you buy a non performer with the intent to foreclose and get the property back, what happens when the borrower files BK 13 on the day of the sale, and prevents you from foreclosing for at least 5 years while paying on their BK plan? 

I gained sooo much time back and for a very inexpensive price.Make a digital library of all your files.

Finally, if you can't find what you're looking for, try the Bigger Pockets Fileplace: https://www.biggerpockets.com/files It contains hundreds of files such as ebooks, checklists and spreadsheets for real estate investors.

Your "Combined Income" is (AGI +Tax Exempt Interest+ 1/2 Social Security earnings) and depending on your filing status their will be different Combined Income thresholds which determine how much of your social security is taxed but if you have $80,000 worth of rental income you will definitely cross the threshold no matter the filing status.

The SBA never even asked me for a list, so how could they file liens if they don't know what I own? 

Get an app that lets you snap a picture of every invoice and receipt, store physical copies in a simple folder in a filing cabinet. 

This seems to be referring to what is often called a "Registered Agent", or someone official in the state who should always be serve-able in the event a process, notice, order, or other legal item needs to be served.For example, many states require every LLC to have a registered agent, which is commonly the attorney that filed the company's formation paperwork. 

I'll leave #2 and #3 to an actual CPA, but I'll throw my two cents in on #1 -- A lot of this is going to depend on how you are structured and how you file.