There are "invisible" boundary lines that seperate awesome neighborhoods from mediocre.

If you are handy it would be a good idea to find a licensed plumber and explain your experience and see if they will allow you to do the bulk of the labor.also with pex in visible areas use rigid pex also color code in red/blue (very impressive to people looking at it), for your heat make sure you use one with an oxygen barrier for heating systems.  

The invisible lines like 15th and sligh that investors wouldn't cross a few years ago are slowly disappearing as inventory in the heights is dwindling. 

Purchase price: $535,000 Cash invested: $605,000 Large lot in commercial zoning.Half acre, in visible C2 lot with 2 side by side residential homes How did you find this deal and how did you negotiate it?

For the client it's an invisible process. 

I realize a single owner LLC is basically invisible to the IRS and that it's all done with the 1040 and schedule C for myself.2.)

From what I understand about having a due diligence period, even a few days worth, is to understand underlying tax implications, severe property issues invisible by just a quick walk through, or title issues etc. 

My only caveat- I subtract 30-35% of total income to the "invisible" expenses of vacancy, maintenance, capex, and property management.

http://www2.nbc4i.com/news/2011/feb/08/3/neighbors-battle-invisible-foe-out-state-owners-br-ar-390108/

Mental and emotional processes such as thinking, concentrating, and interacting with others are other examples of major life activities.19there is also more in that portion.Many people have what are called "invisible disabilities", meaning that it is not obvious that they are disabled.