Does the requirement that the tenant return the unit in the same condition it was received already cover me here/is making the explicit observation about mold just confusing the issue or making the lease seem more draconian than it really is?

I would actually say that most STRs I have had experience with are in far better condition than the average LTR....Just my observations and life experience....

its always a good thing to not isolate your immediate neighbors as they can be good observers of your investments when you aren't around. imo, am pretty sure there is often a need for rooms in most urban (and sometimes rural) populations.

Cracks in the middle of rooms can be an issueWalls; look for cracking in the walls.Small hairline cracks a common and normally not a problem.Also small cracks above window and door openings are common.Larger cracks may be a sign of foundation movement or improper construction of the wall framing.Foundations; walk around the building to observe any apparent foundation movements.While not major problem in the area, this can be an expensive fix.Thousands of dollars.Others; doors and window not opening and closing properly.Several things may be the cause of this including foundation settlement and framing problems.

I like some of your observations as well.

I was merely commenting on my personal thoughts and observations, which are not well informed.What areas of Stockton do you like to invest in? 

Replacement Cost New or Reproduction Cost Minus Observed DepreciationThis method, used alone, usually does not result in a determination of FMV.

You may not find this information as helpful as you hoped, but here is my observations from using home warranty companies:I haven't found one that people are overly thrilled with, with the exception being Super in Washington DC.It is the lowest scored category on Angie's List.

This brings us to a key point about retail trends and their effect on commercial real estate: As e-commerce keeps growing, the retail sector’s need for commercial real estate isn’t disappearing, but rather is shifting as industrial real estate – namely, warehouses and distribution centers – play an ever-bigger role in the retail industry.Indeed, commercial real estate industry observers like PricewaterhouseCoopers and the Urban Land Institute, which publish an annual report on commercial real estate trends, have singled out the industrial segment as the top-ranked property type for 2018 as well as the previous four years, while Colliers recently found the industrial sector far outperforms all other segments.

All you're asking for is trouble, and as you've already noticed, it would take a few lifetimes to get anywhere.Second, you have your answer in your own observation, "...then I would need 40 doors...".