I have done my research but it seems that everybody forgets to explain how the realtor gets paid in this transaction.

Build a relationship with them. 2) An agent could work as a designated agent (solely representing you),  dual agent(I would NOT do that), or transaction broker(they represent the transaction but give NO advice)3) No difference between the process.4) Financing is the same just walk it before offering. 

Typically transactions go through seller's brokers.

Is there a 1031 rule that limits the number of parcels (sold a single transaction) that one can roll over to one larger multifamily property?

I would NEVER rent out an illegal space.

You could reach out to a commercial broker who specializes in Industrial warehouse transactions.

Knowing nothing about the airplane resale market, my questions or considerations would be capital required to do it, holding costs, transaction costs.

.- Once I find a brokerage, I will be able to handle transactions. - I have a business background in Supply Chain and Human Resources - where I would build and continuously improve systems to support profitable/strategic operations, as well as coaching teams/culture/people to success.Seeking any and all advice - Thank you in advance!

However, if you are acting as your own agent to buy or sell your own investment properties you would be splitting any associated commissions with your broker just like any other transaction, but the broker isn't getting a cut of your investment profits.

Looking for an attorney with experience in transactional law and entity formation for real estate investment.