I've been reading as much as I can on the subject, particularly the commercial investment/sales front as that's the field I would like to enter into, or operate primarily in, but I'm curious as to what self-education sources an ACTUAL commercial broker might suggest to a junior/inexperienced agent looking become a competent CRE sales professional in the future, without wanting to harvest a kidney in order to pay for it.

By definition, a 2nd lien is junior to a 1st.

As mentioned, you can add an ADU and a Junior ADU.

We consider researching which of those projects has those benefits before investing in case this is a priority point in your criteria.Mi name is Junior Jaquet 

A detached ADU (750 sq.ft) and a Junior ADU (200 sq.ft.)I'm about to finish the JADU so here is the breakdown,-$8k-$12k for Plans/Permits/Fees (I'm a Civil Engineer so I was able to save some money and time) The entire Plan Check Process with the City lasted almost 6 months.I did the construction as owner builder because I have construction experience and hiring a GC was out of the question because I'm not rich. 1) Rough (Plumbing, Mechanical, Framing and Electrical): Around $25k2) Finish: Another $25k\Time to build: 2 monthsNote: I was able to get quotes from different contractors and the cheapest I was able to get was $75k.

I want to know where further to train the model and how further of a use it could be for deals, whether marketing, analysis, financing, design and so forth since for a penny you basically can a junior employee that can copy your work methodologies. 

@Nicholas Stevenson None of the advice here so far is helpful to you except for maybe what @Deb S. stated about owing a junior partner on a deal.First, let me explain why the above advice is not helpful, and the. 

Robert even then the bank and ALL junior lien holders have to approve the purchase price and what amounts they will release a lien for. 

John, the 2nd would be better off taking a discount on the lien because as Chad mentioned on his post, if the 1st mortgage is the one foreclosing and properly names the second in the foreclosure suit, once the property is sold at the auction any junior liens are dismissed/extinguished as a result of the foreclosure action taken by the first lien holder.

However, junior analysts at ratings agencies didn't look very deeply into these instruments and reasoned away the risk by saying that a large enough pool would mean that even if 1 or 2 borrowers defaulted, the overall security would still be fine.