As a broker, I know the contamination will significantly reduce the value of homes in the neighborhood (zero), and I imagine the company will eventually buy the homes actually contaminated...but if I could purchase the property in question at a large discount and rent (w/proper disclosures) at even half the average rental of the neighborhood ($950-$1100)...  

. - Keep the width of turf area under 15' to reduce install cost (Roll of syn grass is 15' wide)- If there will be pets and heavy traffic, spend the money on a heavier weighed turf. - Put down a copper slag infill to help reduce the pet order smell and future cleanliness.- If you go with concrete pavers, install a solid 4"-6" of road-bock base, don't cut corners on the foundation, it will save you in the long run.

If your still working and not reduced hours then there is no reason not to pay rent.  

Plus you can save on energy costs with a newer system.

We are heavy energy industry in this area!!!

I understand the long-term financial impact of reduced rent vs. vacancy/turnover costs and I, along with most property owners, want to do my best to work with my tenants in this unprecedented and difficult time. 

This shift may lead to employers realizing that many of their employees can easily work from home and that they can reduce their square footage needed at offices.

So your new basis is $150K just like you said.But don't think of it as anything to do with mortgage because that can trip you up down the road if doing a partial exchange or reducing mortgage and paying more in cash.Purchase at least as much as your net sale and you carry forward your adjusted cost basis. 

See if your can work out an agreement with creditors for reduced payment  in exchange for payment as agreed letter on your credit report.  

You can find a mentor and-or partner to reduce your risk.