One good thing that's on your side - many homes in South Florida qualify as "green" but are not being properly marketed as such. I can help you identify those homes, just give me a call or email.
I have a lot more information about green and eco-friendly home buying and selling - visit my website at http://www.devensellsflorida.com/go-green/.
Your attachment to the work inflated may indicate a disconnect regarding your understanding of the real cost of building green that leads to the benefits of living in a green house.
How do you get around it? Don't buy it. Keep your GREEN in your pocket.
While you are holding your $$$$, engage your local politician to release citizens from their bondage to the utility companies. As it stands. the State of Florida, by practice, deed and code, demonstrate their belief that the greatest benefit to the state regarding GREEN is to have DUKE Energy to greenify their infrastructure which those elected believe is more beneficial than single family homes. SO....you should vote for those who have a different enlightenment.
Then, the real action you should take is to make a purchase offer that reflects what the house is worth to you. THEN the research can be completed to discover where the disconnect exists.
In brief there are no free lunches in this industry, as better construction methods keep being developed and building codes amended, mass production of new systems will with time lower their price and make them more affordable. Meanwhile there are a significant number of small project one could do to an existing structure to make it more efficient in energy conservation and hence more green.
For examplle :-A tight building envelope and good insulation might cost a little more but when then the HVAC system that is required will be much smaller thus saving you money, one cost cancels out the other.
Here is an article on a Net Zero Home that cost about 3 to 6% more.
And here is a home that cost $122 per sq ft to build, avg cost in Ct is closer to $200 sq ft.