I would follow Ashish's advice for tax efficiency. 

Further, recent advancements in insolation, heating systems, and window materials have greatly improved the energy efficiency of new homes compared to homes built 15 or more years ago.

Take a look at mini splits they are very efficient but only heat down to about -15 degrees.

Or are there any more effective and efficient ways to get these leads?

I'm also looking to connect with investors who care about things like energy efficiency and creating value for people in poor neighborhoods while minimizing gentrification.My best,-Whit

They were extremely helpful, responsive and efficient in my closing process.

I will tell you the stick built homes are much more energy efficient, way better built, and are worth much more.

Lot's of people can do both efficiently at the same time, and I commend them, but you will need a lot of focus when you first start investing.

Advantages - Quality of work may be at a higher standard;- Aside from the time waiting for the inspector's review the actual project work may be done in a much more efficient timeline; and- Overall project and the work done will/may have more integrity.Disadvantages:- Codes and permits vary and are comprised based on local city/town needs;- Per @Steve Babiak, the code may be up to intepretation in some cases and may still lead to non-complaince;- Licensed contractors typically charge more money as the permits subtract from their bottom line;- The process of obtaining the permit, getting any inspections and follow-up inspections may make for a longer timeline; and- If you don't pull a permit and get caught, you may be fined, the work may be delayed or rework may be required.My humble advice is to...- Ensure work is done by licensed (if required), bonded (for performance) and insured contractors;- Get a performance bond from the contractor for any monies you've paid;- Have the contractor add you to their insurance policy for the work performed;- Sometimes a contractor will ask you the investor or homeowner to pull the "homeowner permit" as mentioned by @Thea Linkfield.

@David KhalfinThe best and most efficient way to go once you have read books, listened to pod casts, and attended some networking events is to shadow those that have successfully invested out of state.