I plan on using DSCR loan and have a pre-approval.

If you have a low credit score (or in this case no credit score) there are fees or an increase in the security deposit. 

My mom has one home in SC that she lives in and another home in GA in which i live inside of. she wants to get a loan from the condo in GA in which she has 150k in equity.

Whole loans only.

The other benefit of converting it to a mortgage is that it will be more valuable if you resell the loan.

It’s true, there's a certain reassurance in traditional, in-person closings where you can see all parties and the attorney right there.Still, virtual closings are generally secure and are backed by robust technology for identity verification, which should ease some worries.

My two partners and I are trying to transfer the title of our investment property to an LLC, while maintaining the same loan. 

We have interest only loans on all 4 properties.

What kind of lock systems are you using to ensure the security of guests?

Non-owner occupant loans are typically Fannie/Freddie loans on properties 1-4 units, property titled in your name, you are signing the loan with verification of YOUR income and financial status.