I.e. what's if the Phase 1 discovers a serious environmental issue?

A small operator type tenant could go dark and then you the property owner are left with environmental problems at the site and possibly other sites surrounding it.With the sale leaseback you need to know who is going to guarantee it.

From a technology standpoint, conventional helicopters are so dangerous, expensive, loud, polluting, and generally annoying that almost any innovation is welcome.

Call your Bureau of Environmental (fancy name for sewer) Services and ask. 

Once you own the property, you own the environmental risk that comes with it. 

Lifelong, systemic lack of access to primary healthcare and nutrition, as well as environmental factors like pollution, can contribute to a higher likelihood of illness and death from the virus, according to the Center for Disease Control and Prevention.

If not that would be my first step, also be sure to get a phase 1 environmental done to ensure the ground is not contaminated.

Is it a great opportunity or a headache with environmental cleanup concerns or something like that? 

An important bill was introduced today that will reduce plastics pollution.

I was unaware and have spent several thousand having property inspected, site plans, environmental studies etc.