And in RE that can translate into your bottom line or even worse into preventing some legal issues. 

However, the seller was Spanish speaking and her realtor translated the whole thing about not being able to flush toilet paper so there were witnesses to her telling me that.

Is a single family home valuation altered or adjusted if its operated as an STR? 

For any permitting issues, it seems like it is ok as long any unauthorized alterations took place before 1982, when the permitting process went in place. 

I would do these to current code standards, and other smaller alterations all to code, without gaining permits.

Changes in Buyer Behavior: If buyers are directly responsible for their agent’s commission, it could alter the way they approach negotiations.

However when I choose a property im considering putting and offer on, I run into issues like existing tenant or vacant with repairs needing to be made before rent ready which is essentially what I’m looking for to force the equity myself.The problem is that I’m unable to find PM or contractors willing to translate what the inspections are showing, what needs to be dealt with, and for how much before closing.  

Recently I've realized that most of the PM companies rent out units at or below market rents and allow for an unnecessary (IMO) turn time which of course translates to increased vacancy rates. 

These deductions significantly reduced the property’s taxable income, translating to immediate tax savings.

Someone with a large portfolio might have a system that works for them and which they have maximized but which might not translate well to your market, your personality or your approach to investing.