If I can scape or use power query on Zillow for free then great, but I think I’ll always have to pay something.I can query now by building customer URL, grabbing the html, and telling power query which elements from the html to extract.

In general I get a 2nd quote for over $3k and 3 quotes minimum for over $8k.I assume at your equity, you have previously extracted money from this property   Curious what you did with this money, but do not answer as none of my business.  

However if I do a BRRRR I can achieve infinite return by extracting all of my investment.

Thankfully, in an active market like the SFV & West-LA, there are so many transactions of high & low end property that you actually don't need photos/videos, the market values it as it should be upon sale, and my program simply reverses that logic.If you want to learn exactly how I extract the comps from the larger dataset and calculate the ARV/ACV values based on that comp data, checkout my older post here & go through the comments: https://www.biggerpockets.com/forums/48/topics/1130680-i-mad...

The 25% of RE still owned is in effect purchased at 40% discount allowing cash flow and full extraction of investment providing infinite return. 

Labor for water extraction, 3.

NOT gona happen.I am not sure what you are saying but assure you I have extracted a lot more than $45k/year from my properties (but $0 in last 2 years).  

Remediation methods can vary greatly depending on the type of and extent of contamination, ranging from soil excavation to more complicated soil vapor extraction systems.

So, IF you agree with that premise, then I would encourage all of us to examine assets through a tax-advantaged filter just to be mindful of how we are accruing wealth based on how much of a chunk the IRS will extract.

Networking with them can be challenging, and extracting the specific information you need to transition into this space can be even more scarce and haphazard.To my knowledge, no certifications are required to officially label oneself as a developer.