It stopped operating over 5 years ago, but it still has to be tested for potential pollutants.

That would also result in less cars / pollution. 

Land development is very expensive by nature, depending on the upgrades to the facility (permits, earth movements, storm drainage, utility services connections, county and city fees, sanitary improvements that the city may assign with your improvement, permitting, storm water pollution fees and costs, roads improvements and parking lots requirements, etc.)  

@Patrick Philip That doesn't cover anything related to workers, only worker's compensation insurance does, plus you are violating irs laws on employer/employee including but not limited to independent contractors, witholding, etc. everything is a liability policy, there is commercial general liability insurance policy, worker's compensation insurance policy, excess/umbrella insurance policy, automobile insurance policy, pollution liability insurance policy, professional liability insurance policy, installation floater insurance policy, etc. be careful and good luck.

Possible pollution liability.

Doesn't San Diego have earthquakes and canyon fires and pollution from Fukishima and traffic and taxes and crows?

Imagine commuting to Oakland from Stockton every day:(...General Observations about ads on Craigslist.First of all; Craigslist's "housing" section is starting to get more and more polluted/spammed by "Rent-to-own" operators.

@Leona N. municipality ordinances on signage/light pollution may be your friend.

Folks may not want to sleep under a source of "light pollution" which shines in their window all night.What you may want to include in your plan is owning the property where the billboard stands, but having that land fenced off from the tenants so the sign company can have unlimited access without disturbing your tenants to open / unlock gates and such.Stuff to think about ...

It's not just the pollution issue it's also emissions and the smell.