What are the Environmental costs?

Are solar panels a cost effective route or more of an appeal to environmentally friendly people?

@Peter Yun You probably already know this, but be sure you have the environmental bit under control.  

Plus, the best part of septic systems are they are environmentally sustainable and you don’t have to pay city sewage fees.

You need to have them fill out this form, http://www.mass.gov/eohhs/docs/dph/environmental/s...Once it's signed you need to have it filed with the city board of health.

Waiting on area cap ex before final nail down.I like the idea of blending the owner/bank financeing if the seller baulks at owner only financing.I have accounted for inspections (building and environmental) into my closing costs and will certainly use the findings to negotiate a better price if needed. 

Once you are in due diligence, you get a real survey to perform a survey, an environmental engineer to do a phase I, a real building inspector, etc.

Anything adjacent to the super fund site might decline in value due to the perception of the environmental conditions.

The alternative is not spelling that out in the contract, but if you run into an issue, you can negotiate an extension for just that particular issue, so let's say you had to do a Phase II and your report didn't come in yet, you can extend the inspection period for however many days your vendor expects it to take, but you can only terminate if an environmental issue is revealed in the report, not for "any or no reason" anymore, not if you don't like something on a new report you decide to get, or on a survey you already had, etc., just that limited issue.

Unless you are doing it for ethical/environmental reasons, then go for it.