If you will be Jumping in to a joint venture, you will need to ensure to have an exit strategy and go over every single situation possible to avoid any issues with your sister when problems arise.

Short-term rentals are very popular and can be a good strategy for getting cash flow because we're close to the beach. 

I can see it being very popular in the summertime and you can lease in the winter.

Estate planning issues can sometimes arise as well.  

Studios are popular for Air BNB but also for other short term tenants such as traveling hospital workers.

That's what my wife keeps saying, and she generally seems to know what's popular before it's popular.

I hear a lot of mixed reviews about Nashville, but it seems like a popular market.

A rising tide (increasing multifamily values) floats all boats.

Often times there are meet-ups and virtual meetings that will allow you to get familiar with local investors, the current market, and what areas/contractors/realtors etc. are popular.

If the LLC has 10 properties, then when the LLC has a debt arising from property 1, the victor plaintiff can collect against all properties.