So the property deteriorates to the detriment of all.  

It was a run down vacant 4 plex that had sat for 13 years deteriorating, but I presented terms to the seller and found out what his hot buttons were.

The home has been vacant for about 15 years and has deteriorated substantially since it was occupied.

Annecodately, I was told to stay away from other types of foundations (i.e. piers).Are pier foundations more susceptible to damage and deterioration, that it should be a concern for long-term buy's?

Rent's are the lifeblood of our industry and impact everything from lending availability, asset valuation, default/solvency risk, and more.It's surprising to me we haven't seen more deterioration in that number given the rate and level of unemployment.

You'll also want to ensure you have a good property manager to look after the upkeep of the property if you are not there to notice anything deteriorating or which may need attention.This article goes into a lot of the considerations about whether to form an LLC or not: https://www.mmpph.com/wp-content/uploads/2019/04/May-2019-newsletter.pdfCreating an LLC in California would cost you a minimum tax of $800 every year.

I was lucky and the tank had not deteriorated too badly (no holes developed that would have caused suspicion of a leak even if there were no holes years prior when it was retired) and after it was removed they took away the soil and brought in new soil.

But she tried to retreat behind her mother's mental deterioration as an excuse to back out saying I wasn't being "fair". 

We've seen old old sewer lines (1940-1970s concrete lines) collapsed, grown through with tree roots, and otherwise deteriorated and we've seen 2 year old lines with "bellies" that cause them to "skim over" with TP and then back up into the house. 

This will cause further deterioration of the middle class and increase the poverty class by increasing the number of life-long Renters who miss the opportunity to build generational wealth through long-term home ownership and building equity.