@Mario Reyes No one here has access to what is in your lease agreement, so we don't know what liability you may or may not have in this instance.

Can anyone share their STR lease agreement?

So, you should be able to pass along your interests by writing it into the Operating Agreement. 

that said you can always ask, you can always offer them cash to leave and if both parties (landlord/tenant) agree to end a lease agreement you can always do that. 

If we bought a house and a mother and her two kids are in it and we were never given a lease agreement or deposit how do we get them out and get their stuff out?

A day of personal use of a dwelling unit is any day that the unit is used by any of the following persons.You or any other person who owns an interest in it, unless you rent it to another owner as his or her main home under a shared equity financing agreement (defined later).

I'm getting the property ready for listing and have a few questions:- Thoughts on good property management tools that would allow me to list, send lease agreements, receive rent payments? 

I would make sure my rental agreement mentioned there were no communication methods. 

Is it common for real estate agents in Miami to make a buyer sign an exclusivity agreement?

I highly recommend that you reach out to both a fix and flip lender and a debt service coverage lender prior to signing an agreement of sale.