I had to deal with a lot more issues than I've ever had in non-S8 rentals like extensive property damage and also bed bugs, roaches, drain lines completely clogged up by grease (I learned what sewer worms are, look it up), spray paint art on walls and food on ceilings, noise complaints, police at the property, removing dead bodies, etc.  4.

Tell the tenant that his opinion carries zero weight, so he must submit proof from an ACCEPTABLE expert to support his alleged foundation issue.Until then, he will be held liable for the terms of his lease, to the fullest extent of the law.

A quality operator is worth its weight in gold.  

Results are FAR more weighted on HOW and WHAT a person does then where they do it.

First of all, their certification program is NOT accredited by any legal body so it is basically worthless other than it may look good on your wall.

So I understand the owner loses right to possession once some body buys the tax certificate?

It sounds like you are looking for an employee as defined by most taxing bodies.

This Corp will get a fee for the management.That would be a way to convert some passive income to active income.As active income does not have the same tax advantages as passive income you need to carefully weight the benefits that you can gain from a Corp (Many more deductions available, retirement plan contribution) versus the additional cost and taxes.

A razor knife around it cutting the paint and some elbow grease usually get it moving, then address springs or weights on them plus some soap on side helps it slide. 

All these SINGULAR city charts/metric to INFER a MSA weight are best defined as GIGO, Garbage In garbage Out.