My niche is finding deteriorated properties and using my capabilities to renovate them and build equity.

As Is does not mean the condition can deteriorate during the contract period.  

It's an old school basement with stepped in walls that are in good shape, but the old school cinder blocks similar to a crawl space wall are deteriorated and broken.Anybody in Wichita,KS have a guy they would share?

Why do you have a property manager and your property is facing so much deteriorations?

I may come down on rent if the neighborhood has deteriorated somewhat (hopefully not, and I'll likely sell if it goes that way), or go up by double-digit percentages if I am too far out of whack in an area.

If the pipes are galvanized and subsequently rusted or deteriorated then you can either tunnel under the house (stupid and unsafe if not done correctly) or hammer the slab and replace it with plastic. 

J Beard is a big one in my area but his properties (at least in my area) stay on the market so long that his signage ends up falling over and deteriorating in the Texas weather.  

Most roofers would not (or should not) install that many layers for several reasons: voided shingle warranty, accelerated shingle deterioration because of the layers underneath, and constant callbacks for nails backing out of the shingles due to the nails being too short to grab wood roof deck under all the shingles. 

The work that was done was based on the evaluation recommendation of "long term construction  material shrinkage, deterioration consistent with age of the structure, and differential foundation movement". snippet from summary.

Effective Date: 11-25-1969 5313.10 Terminating land installment contract is exclusive remedy.The election of the vendor to terminate the land installment contract by an action under section 5313.07 or 5313.08 of the Revised Code is an exclusive remedy which bars further action on the contract unless the vendee has paid an amount less than the fair rental value plus deterioration or destruction of the property occasioned by the vendee's use.