Trying to see if this is of value to investors or a big fat loser idea.

Don't forget depreciation is not included nor is principle reduction nor is potential for appreciation.

Hence a rent reduction might be best for you.

As well Obama has made himself accountable for a reduction of carbon emmisions by 80% by 2050.

If you mean that you ask for reductions for every house you buy...this too may be a bit much depending on how much you buy.

I think any area that has seen a significant increase in prices, and has not yet seen a regression to the long term trend (inflation), is very likely to see continued price reductions.However, areas that have been already seen large price reductions may start seeing some appreciation again.

I am not aware of any program that provides funds for procuring a Certification.And yes there are credits for water use reduction.

BTW, ideally the assessor (lets say) comes back with a 20% reduction in the home price does that mean the lender will also reduce the loan amount by 20%?

Once I get to a target number of doors, I plan to off load all PM and maintenance/renovation duties to others and get fat laying on beach while sipping on fruity drinks. 

The next 12-18 months I plan on doubling my SDIRA acct, increase properties owned by 50% w/ a 50% reduction in debt (mortgage balance).