Yes there is some subjectivity in appraisals, it's not an exact science but often times when the range of opinion is that huge it's because the appraiser didn't take the time to verify all of their data or isn't truly that well-versed in their market and didn't disclose that fact to the client and take measures to rectify that (i.e. consult other real estate professionals in that area to ensure that their adjustments make sense). 

My first advice is to educate yourself before you start looking at markets. 

I'm curious to see if you guys have any opinions on where you see a lot of fix and flips happening in/around Denver?

Do you have any other opinions or advise?

How is the continuing education?

My opinion:  I doubt that it is an illegal question. 

Research the niche that interests you and get educated.

Im currently looking for recommendations for a foundation engineer in the Oakland/East Bay area of Northern, CA who can provide an unbiased opinion on whether there are foundations issues that need to be resolved.

I'd be happy to recommend some local contacts for insurance if you'd like another opinion.

My opinion is that nobody knows what will happen in the future.