The gunk is more a subjective opinion of what an ideal looking one should be.

Those two subjects will help you become a better REI more so than any other books you can read. 

Yes....once you become licensed, all of your real estate activities are subject to the supervision of your broker and your states real estate commission/department of licensure. 

Here's some "light" reading if you want to learn more about this subject directly from the source (IRS):IRS: Federal Tax Liens - RedemptionsIRS: Legal Reference Guide for Revenue Officers - Federal Tax LiensIRS: Guidelines for Processing Notice of Federal Tax Lien Documents

Yes, however the terms of which are subject to your broker. 

This same property will frequently be listed again in a couple months.

My Team knows what I want to accomplish (because I told them), so there's nowhere for me to hide from their frequent, persistent check-ins to ensure I'm making progress.And that's only fair, because that's exactly what I'm going to do to/for them with regard to their goals!

And then there's the law of unintended consequences - - the businesses who no longer make money because of the tax will shut their doors and/or move to a low tax state (I hear much of Silicon Valley businesses are moving to Austin TX which might explain the RE appreciation there) and Puerto Rico has tax incentives for corporations for moving there- the businesses (LLCs & Corporations) that leave (or go out of business) will no longer pay the minimum $800 franchise tax (or any other tax)- the wealthy that might be subject to the "wealth tax" will just leave (Peter Schiff leaving NJ for - I forget - moved to FL and business in PR?)

If the subjects interest you, then I think they would be worthwhile.

and trust that you would deed it back to me (at no cost)... and you trust me that I would make all your mortgage payments (sort of like a subject-to transaction as best I know them).