Is it right that short term rentals are considered as licensing the property for use (similar to a hotel) and not a lease for a long term rental and therefore do not require a brokerage license to provide management services that include price adjustments? 

If you ask the manager to justify a fee and he starts hemming and hawing, move on or require them to remove the fee.

"variable income" will require a 2 year average of income/ earnings to qualify. 

“A company is required to file a notice with the Commission on Form D within 15 days after the first sale of securities in the offering.”5.

Know the rules of the sale, some sales wipe out liens, some do NOT, some require only cash payments, others won't accept cash, personal checks or business checks, some require pre-registration, some require that the bidder can't owe delinquent taxes on any property, some vet the bidders for state and Federal liens,.....2. 

ADU zone expansion is not certain, and even then who knows what the rules will be (owner-occupied requirement, etc).

If they are pre forecloure/foreclosure, probate, or lists that require fast access to the lead to gain an advantage how new is the list and are the leads already on the prominant platforms like Propstream and Propwire?

The world of real estate has changed.The result of the lawsuits is that a REALTOR® is now required to have an exclusive buyer's agreement before stepping into/onto any property on a potential buyer's behalf.

BTW: most owners that have hired a PMC, don't want to speak with you, much less meet with you in person to hear a hyped-up sales pitch.Also, you want to do rental arbitrage - so, you will need to be properly licensed to manage properties you do not own as required by your state & local laws.- why would an owner want to do business with someone NOT properly licensed?

In fact, the more issues that arise, the more profitable theses properties become for the ancillary service providers....and you want to know why these investments are pushed aggressively by so many (besides of course requiring nothing more than a pulse to buy them).