What would you advise I do you have for me on this topic?

Consulting with a contractor or local building official is advisable to navigate compliance with safety requirements while optimizing your renovation project effectively

So that's another area that they will need to advise you on.  

I am concerned about the implications of transferring the property into an LLC, especially since I have a favorable mortgage rate that I would prefer not to jeopardize.Would it be advisable to establish an LLC, obtain a PO Box, and open a business account without transferring my current property to the LLC?

It would need to be a savvy Seller to agree to this. you would be nuts to advise your clients to do a sub too..

(It is worth noting, I am not a lawyer so cannot advise you.)1) This option would minimize paperwork and provide good protection.  

If you're considering this route, comparing different providers and understanding their specific requirements is advisable.

It would also be advisable to discuss this with an SEC attorney for both personal protection, and hopefully the sponsors are doing the same to make sure they aren't getting in trouble.The conservative answer is: be a broker-dealer and you are in the clear.  

I advise everyone I talk to about remote investing to take your time and take a trip to see who it is you'd be working with before you start buying. 

Readers are advised to seek professional advice.