Although I'm not a builder or a construction guy, it seems that when the house is built, the frame is put up, then plywood is nailed to the outside of the frame, then, a vapor barrier is put on outside the frame and plywood, then, outside walls (commonly brick, sometimes something else (stucco for example).But, once the house is already constructed, the ones I'm looking at that have been stripped inside, it seems difficult to replace the plywood and vapor barrier between the frame and the brick.Any suggestions?

That is an expense that I can nail down hard in all cases.

Know that you're going to get a few scars and break a few nails for those hard won lessons (I broke 4 nails yesterday - it was a good day).  

I would say you nailed it...but I would be wrong. 

You also hit the nail on the head about top tier schools, the diploma only gets you so far, at some point you have use your head and actually work.

Also working with investors they just want the deal and if you are presentable they could care less about the other stuff.When you get into second tier and some upscale homes then you have to generally look more polished and a newer looking car.That is just the way it is around here for the most part your area might be different.

Unfortunately, the water line was still too close to the wall and a nail hit it when the dry wall was put up. 

We look for internet resistant tenants ( food,karate,barber,gym,doctor,nail salon, hair salon,etc.)

They have made nail holes in the wall and patched poorly with different color and I had my painter paint the whole house without charging the them.

Patrick, I think you hit the nail on the head of what I was suspecting.