Also, what if circumstances change for one of the partners and all of a sudden he or she can no longer be involved? 

There was a show on TV two decades ago called Designing Women...3 older ladies living life to the fullest.

I cannot think of any circumstance where LLC's will help you gain any advantage in a lease option scenario.

It all depends on circumstances. 

I wonder if anybody has any data on this.I did a little more research and found that off-street parking can be waived in certain circumstances, and I believe mine may apply - there is a retaining wall between my backyard and the alleyway. 

You can do your own analysis using some of this info to see how it would work for your specific circumstance.

@Federico Gutierrez yeah, I know it has its benefits under the right circumstances.

Everyone's circumstances vary, but I'm determined to quite my 9-5 and I know that having well rounded experience can only help me reach my goals faster. 

Never seen anyone come close to what I get from my local bank given my circumstances

Your state may take longer so you may just want to fine her and then ask her to leave or wait until the lease expires.Under no circumstances would I allow her to stay without a significant fine.