Typically there are laws about the property being maintained in a habitable condition with a limited time frame required to complete habitable related repairs, i.e. electrical, plumbing, heating, cooling, ...As a property manager, I agree with you that there seems to be "a lack of quality assurance" as well as a lack of communication and sense of responsibility from your PM. 

I am wondering how common lead pipes are (such as galvanized steel plumbing) for houses in Akron, especially houses built around 1945?

Alongside other NAR liaisons and committee leaders, Malta stressed the need for a more sustainable long-term solution to representatives from the National Economic Council and White House Office of Domestic Policy Council.After the executive order was issued on Sept. 1, Malta quickly urged consideration of housing providers who continue to fear wide-scale financial ruin in the prolonged absence of rental incomes.

Additionally, there are some major property components which aren't visible from a walk-through of the property, like plumbing and electrical, and assuming they need work is safer than assuming they don't.  

Purchase price: $195,000 Cash invested: $5,000 Historical house that underwent a complete gut job, new plumbing, electric, hvac, drywall, roof, insulation, after a fire that occurred at the property in 2019. acquisition also included a buildable lot in the back.

Items needing repair and/or replacement may include: roof, hot water heater, plumbing, heating and air conditioning unit, etc.

Next time say it’s a sewer leak, when you say slab leak that says it’s the domestic fresh water system issue.  

Purchase price: $75,000 Cash invested: $28,000 This was a fun purchase, we added a bathroom (first time doing an addition), as well as a major cosmetic overhaul of the house and some plumbing/electrical.

Hired a plumber to do the plumbing, etc.

It is a complete gut: Foundation, Electrical, Plumbing, Roof, Drywall (walls and ceiling), Additional Bathroom, Cement Driveway, Back Porch, Landscaping, EVERYTHING.