It's proven science that many of us are prone to do things which we perceive as saving us money. 

Not exact science I know.

@Jason Yarusi Fascinating insight.

I'm fascinated by a lot of stories I heard on BP.

Rehabbing takes good analytical skills, discipline and good decision-making, but it isn't rocket-science, and can be very profitable, even (and especially) in this market...

One of the most fascinating things I gain going to my local REIA meetings is seeing so many different strategies that work.  

And I can't think of a better way to do it than through the fascinating world of real estate! 

They are definitely not rocket science.  

This business isn't rocket science.

If you were to heavily insulate the inside wall of an old double/triple wythe brick building the external wythe may no longer dry out thoroughly and be subject to excessive freeze - thaw damage.The best way to insulate old brick buildings is from the outside - which has the added advantage of turning all that brick into a thermal mass in the conditioned space ... alas, most owners of old brick buildings are unwilling or unable (due to historic designations) to insulate over the external brick.There are some informative studies and papers by John Lstiburek and the folks at Building Sciences Corporation about dealing with old brick buildings.