Things like this are why it's important to work with a professional who is well versed in real estate taxation because the "common/simple" strategies taught frequently like BRRR or house hacking actually get fairly complicated when it comes to handling it correctly. 

I think this will be a very complicated answer. 

That would make this much more complicated, since you'd likely need lender approval.In any event, you'll want to check your mortgage (if you have one) and the lease to see if you can transfer or assign.

If I wanted to convert solely to me as the primary (investor/owner)..in the transfer process (to me solely) a complicated one?

On a larger and more complicated claim is when a public adjuster working for you makes the biggest difference.  

If you do not have a US citizenship/green card, there are some complications investing especially financing so it's really important to do research.

I don't know, it sounds kind of weird but my friend is kind of freaking out about potential liability since the lien was literally placed on the house essentially hours before closing.This is being made all too complicated.  

Don't make it more complicated than it has to be.

In most cases, neither is warranted.Warning: I am not an attorney, and this can be a complicated topic.

Everyone wants to make this complicated.