Our suggestions to our clients and customers regarding regulatory law is to adapt the attitude that being guided by the most draconian of the sets is the safest course of action. 

We all will have to adapt to an infill mindset one day.

Vurtually every deal has some kind of wholesaler, cash for keys, unexpected rehab, whatever comes up, adapt and move forward.  

I use the 65% rule for evaluating rehabs, but that's no good for teardowns, at least not without modification.Can the 65% rule be adapted for teardowns or is there another way that builders determine MAO? 

The other topic that's of high interest to me right now is how is the RE community adapting to the inbound marketing concepts that are all the rage nowadays.  

Knowing that and being able to adapt to what they want/need allows me to serve them better.Good Luck!

For me I will continue to look for deals, try to keep learning all I can and adapt to the changes.  

The first thing to do would be to contact an architect with experience in adaptive reuse of old buildings.  

But this is a Long play, and being able to pick the winners/losers; developers/adapters and followers. 

Luckily, so far everyone I've talked with at City of Portland has been gracious with me being an amateur asking questions and instead of a conventional route for the site plan / architectural drawings I'm at least starting out with outsourcing it to an architect in Pakistan (and then adapting the lumia drawings myself).