There's lots of advice here on BP, and once you're able to discern the good advice from the rest of it, you're in a really good space in any niche that you choose.

As far as I have discerned, the area I am interested in has a high emphasis on knowledge worker type jobs (tech, software, engineering, financial, etc).  

The metal detectors will pick up any metal like rebar in sidewalks/driveways, iron sewer lines, etc. so gives more false positives that can be hard to discern resulting in a report that identifies "areas of concern" with no real conclusion. 

His expertise in Staging, Marketing and Contract Negotiations make him the ideal choice for discerning clients.

I could not visually discern the difference. 

It helps both parties to discern if the tenant is likely to qualify to rent the unit, saving time and energy for all.

I don't think people discern the type of debt enough in these discussions. 

You need to filter what you hear, read and see, to discern what is right for you. 

Yeah, the electrical can be tricky trying to discern what others were thinking when they did it especially on these older homes were 30 people over the years have probably thought they were qualified to run wiring.

. :) Up to you to discern the logic and decide where you want to buy your beer, $5 a pop at the bar, 12 pack at a time at the corner store, or a whole case at a time.