There was a previous tree trunk buried under another newer plant.

It all evens out over time, so as long as you have other income coming in to eat and keep the lights on you never really suffer a loss because you don't sell when its down. 

I am not seeking to capitalize on the misery of others, but I do not want my family to suffer from my lack of planning from this earth shaking event. 

Intel is a great example, who is building the largest chip manufacturing plant in the US right here, and it will be a $20 billion dollar investment that brings a few new thousand jobs.https://www.dispatch.com/story/business/2022/01/21/intel-ohio-building-computer-chip-factories-licking-county-jersey-township/9173472002/ Here are a few more recent investments https://www.10tv.com/article/money/business/hydrogen-power-company-hyperion-bringing-700-jobs-to-columbus/530-25907aab-5517-4661-a9f3-d2ed2d5be6b0 https://news.wosu.org/news/2022-02-08/rumpke-to-build-50-million-recycling-facility-in-columbus

There's going to be 4000 people here for a 3 month maintenance operation at a plant. 

If a managed property falls into complete disrepair and suffers a roach infestation with such a magnitude that every fixture and cabinet needs to be completely replaced, due to roach feces, where does the property management responsibility lie?

Back it up with a REAL doctor's diagnosis of the problem (nobody less than a bona fide MD) that your daughter is suffering and why.

It'll be 6-9 months before you get calls but start planting the seed now. 

Too much copper is toxic to plants because it prevents photosynthesis.https://homeguides.sfgate.com/copper-control-algae-97682.htmlThat said you should get the roof inspected.You may get lucky, the roof may be in great shape other than the algae on it ( note there are shingle solvents designed to wash off roofs: don’t bleach ( bleach is ineffective against mold) or power wash.)Once cleaned, install the copper as a preventative measure.Other wise I agree with many of the comments, you might have to bite the bullet on the roof, a roof is a big deal to perspective buyers.

Businesses suffer at the hand of new development and anticipated population growth in new parts of the city.