It spirals out of control where John says operating without a license is not honest. 

I might suggest:A - 6-8%B - 8-10C - 10-15D - 15+You do need to be watchful of clustering of many distressed/criminalized MFs in an area, which happens often in urban areas as criminal activity and unemployment leads to vacancies which leads to broke landlords who can't fix their distressed units, so more people leave that area, and it just spirals down from there.

Steep learning curve.Expensive hidden costs.Always 10 times more to do than it looks like.Costs spiral fast.

I give them a copy of my 30 or so page business plan spirally bound at Kinko's with a color cover.

With real estate you have the added part of capex which can compound a bad investment into a downward spiral of horribleness. 

This enabled people to walk from the kitchen to the back deck without having to go through the first floor bedroom.Did the same thing on the 2nd floor, so that people could walk up the spiral stairs and not have to pass through the 2nd floor bedroom.

Mold removal can get really expensive, so you want to make sure during the inspection period that costs aren't going to spiral out of control. 

Nice summary , spot on , I was dying to find a way to expand the shower , there is no affordable way - the costs just spiral out 

I was curious if anyone had used spiral stairs in any of their plans?

This creates a downward spiral which few locations ever recovered.