This is my first BRRR and would like to hear from experienced investors the proper way to handle the financing and title work for the property.I am buying this with a partner, who is a family member and in the LLC with me. 

If they are not out on time as agreed begin the process to evict, make sure you inform them it will be on their record.As far as the deposit is concerned you can charge for any material used to repair or bring back th eproperty to a proper appearance based on waht you know they did in regards to damage.

It is an asset protection vehicle if managed properly. 

Should I pay off the balance of 8k and look into hiring a contractor and management team or should I turn over the project with it being down to the studs? 

The fact they are complaining online might be an indication the property manager dealt with them properly so be sure to ask the manager for their side of the story.I hope this basic guide helps.

You have the right as the owner of the property to send notice to properly maintain the property.

I may be able to get a financial partner for this balance but if I cannot what are your thoughts on using an additional loan?

In our case, my wife helped her mom manage the finances for a number of years, like over 20, account is jointly held, and the account balances ranged from $50K to over $100K.

The last part of your question regarding building a JV with a friend ... just make sure you structure the JV properly and have ways to clearly protect yourself.  

The fee is often 10% of the gross rent due for the balance of the term.