Hi Dirghayu,CMBS is a more complex borrowing instrument than a typical loan.

I was told that LLCs needed more than one person for it to work like a protection instrument. 

Court searches, with local tax certificate for village or City taxes, if any (collectively the "Abstract" and (ii) an instrument survey map, certified and prepared to meet the Standards of the (locality) Bar Association and Buyer's mortgage lender, if any (the "Survey").

Looking for some books to get a better understanding of debt, how to leverage it, taxes and how to use them to my advantage when investing in real estate or any financial instrument.

In terms of financing, what instruments are typically used for acquiring STR property?

It must be an instrument in writing and it must be a specific identification. 

A sale, may or may not create taxable income depending on the basis of the property and whether they utilize 1031 exchange to roll proceeds into another property.In general, REITs are stable consistent dividend yielding investment instruments.

Borrower shall occupy, establish, and use the Property as Borrower’s principal residence within 60 days after the execution of this Security Instrument and shall continue to occupy the Property as Borrower’s principal residence for at least one year after the date of occupancy, unless Lender otherwise agrees in writing, which consent shall not be unreasonably withheld, or unless extenuating circumstances exist which are beyond Borrower’s control.Is this just boilerplate?

BP has been very instrumental in my education towards becoming a RE investor.

A corporation whose primary revenue is from passive sources (rental properties, stocks, other investment instruments), is not eligible for the small corporation tax reduction and will pay income tax at the full corporate rate.