While still allowing the owner to sell it herself without being obligated to pay a commission. 

My long term goal is financial freedom, I spent my 20s grinding away thinking all debt was bad and the stock market would do it for me.

While the general rule is that the law of the state of formation should govern the regulation of the internal affairs of an entity, including the liability of an owner of the entity for obligations of the entity, it would appear to be a stretch for a jurisdiction without series LLCs to recognize the liability limitation function of the series within the LLC on the basis of the internal affairs doctrine - the effect of the liability limitation function applies to third-party creditors of a series, not just to the internal affairs of the entity and its members inter se, nor, unless a veil-piercing claim is involved, to the liability of a member for debts of the series or the series LLC.

I'm a 25 year old new grad RN and recently been looking into Real estate in a hope of gaining some financial freedom.

Wanting to better my financial situation by being better with my money, I started listening to books on finance.

I would ask for actual numbers (gross revenue/net revenue) and see if it makes financial sense for you.You'll need insurance that covers vacation rentals which most carry now - just ask your current provider if they do or don't.Other costs:Registering the rental for the short-term license, Florida sales tax, and all county taxes.Will you be self-managing or hiring a manager?

Just trying to figure out which model makes more financial sense. 

Unless you live very far from the property, you must manage this small property yourself if you wish to have a financially successful investment. 

I provide good homes for good people and that strategy has rewarded me financially and karmically.  

I believe the seller is motivated to sell due to financial difficulty but that is solely based off of speculation.