Charlie didn't see AC on your check list, so he's assuming it would be an upgrade to the house.

My parents house used the same one for thirty years, my student house had a used one that never broke, my personal house uses a hand-me-down one that has never broken.

Perfect questions 'Neighborhoods' Philadelphia is broken down by neighborhoods and price accordingly based on rent, sale and diversity.

Owasso, Collinsville, Oologah, Claremore, Broken Arrow, etc.?

I owe: Freddie Mac loan: $112,337SHIP Grant (mortgage): $45,000Total: $157,337In my community recent sales have been as high as $124k (for a flip that was fully upgraded) and average around $105k.

All items from IRR, to plans, to any utility upgraded you will be responsible for to meet the CURRENT "CODE" for all trades , dirty work aside from demo, drainage is ALWAYS a major concern and will require engendering, will you have to install and or improve of site land or hardscape, disability access requirements, and a number of other factors.....

I'm sure people like to feel their investments are safe and not being broken into .

In considering how much to renovate and upgrade, I always analyze how much the unit will rent for and what the competition is offering.

You are correct that if it is left undisturbed there is no harmful effect,  where the issues occur is when removing them or if the are broken and the dust gets into the air. 

I deducted about $30 from their deposit to cover a few cheap window blinds that were broken (even though I replaced all of them) because the honestly rest was all normal wear and tear.