So i think you are in agreement that the only process that pays off your mortgage early is paying extra to your principal.

@Charlie MacPherson Unless all affected owners agreed to the easement, the agreement is a nullity. 

Review their management agreement.

My understanding is the Padsplit’s member agreement model is to avoid such situations.

Based off the information you provided, it sounds like there's no issue from your end.In the future, you may want to include something in the lease agreement that outlines objects that may be stored on premise.

In other words, what forms or documents will you use for your purchase agreement, disclosures, reports, statements, and all the other complicated documents that go into a California real estate transaction? 

If you're looking to make short term use of the equity and have a private lender/investor who's willing to think outside of the box, you might be able to create a custom repo agreement. 

Review your loan agreement for restrictions, and consult legal and tax professionals to ensure compliance and protect your interests.In C State, you can elect to file MMLLC as disregarded entity for tax reasons.

I would look at your listing agreement and talk to them.

Some employers, (when you're 50+) 401k adoption agreements will allow you to do an "in-service-rollover".