Is there a difference between choosing up front to only put a percentage of the proceeds into a 1031 versus doing a full 1031 but failing to meet the conditions?

It's about playing the percentages for agents.

The only way that we are officially getting our Airbnb sanctioned is that even though its our entire 3rd floor its "part of our unit" and the square footage is under the percentage allowed.  

In any other market, many would advise against this action due to its low monthly rent to acquisition price percentage, but since its the Bay Area market do we judge properties differently?

Of course, everything was analyzed prior to making the deal, meaning that the investor already knew what the numbers were (minimum mortgage payments, cashflow from each unit per month, cash-on-cash ROI at or above a certain percentage,etc) prior to making the offer.  

And what percentage of commission do agents usually get let's say I want an agent to help me buy a property.

I can usually pick up a small percentage of these homes but often they get purchased for way too much money.

The percentages should reflect your risk tolerance accordingly.  

If you can bring a deal to any investor, give away a larger percentage of the deal so they know you're serious about the relationship.

Do you agree on the percentage return they recieve?