You can assume some percentage of them will have foundation problems, system problems, roof leaks, etc.- Significant title risks.

Would you recommend an online banking system or a a brick and mortar system??

Your realtor and lender should walk you through the process, but with an FHA loan you'll get a professional inspection and report on the condition of all of the systems of the house.

I was able to produce emails, text messages, signed agreements, and I had an experienced attorney who specializes in real estate contracts.I've been this route before so I understand the process and the system.

How long until the local government sets up a system where you are required to submit your vacancy to them and they assign a renter to your unit? 

My thinking was that if a system fails and causes damage to the property, your insurance policy could kick in and help with part of the repair and/or replacement.

You can look up the taxes of any property in the Hudson county online system and most of it is accurate as of 2017. 

It had been on the MLS for awhile with no interest due to some glitch in the system where it would not show up.

The credibility you are talking about is just you implementing your systems and maybe a letter stating rent is due when it is due and that late fees will always apply going forward.  

Part of this is that if something catastrophic (but not total loss) happens, I don't want an insurance company telling me how much they will/won't pay based on the age of my systems.