Generally though, you can deduct interest on the mortgage up to a certain point.

You deserved two of them for your AL stand-up routine. 

Rents will go up.

Us: We want to buy the property, fix up the (3) apartments not occupied by her parents to generate rental income.QuestionsMy thoughts are to work out a deal where we purchase the property from her parents without taking a loan from bank.

Just transferring it gives you zero protection - the reason why it never comes up is because no one can name ways you get sued when you have a good insurance policy so its a mute pointSo long story short, you are wasting money transferring it to a LLC is my personal non legal non tax opinion.

Who gets blamed for and/or has to handle the following unique to nonfamily roommates:1) Missing personal possessions?

My main goals with these initial projects are:1.Gaining valuable insights into the local market.2.Getting hands-on experience with out-of-state investing, particularly when it comes to remodels and managing from afar.3.Testing the entire BRRRR process to see if it’s the right strategy for me long-term.If all goes well, I’d love to scale up and explore multi-family projects.

I read the permitting process and it seems somewhat strict.

Check with your CPA, the people setting up your LLC and/or your QI. 

I know you don't want to deal with tenants and their problems, so why not either:A - Buy a NNN property where you don't have those problems, but still have cash flow,...orB - Take your $500k, and partner up with another investor where they deal with the tenants.