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.

Or find good BRRRR that allows extraction of all or near all investment.  

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.

I've started this process using credit cards again, using PayPal to extract the money at about 2.9% and Bigger Pockets calculators to analyze the deals.However, now that I've aquired the money I'm not finding the deals I did when I started last year.

I would maybe explore refinancing your current primary residence with an FHA and see how much liquid you can extract.

I estimate their combined value based on the current market to be around $900k.The goal would be to extract max cash out.