So this investor wants to put his capital into the LLC that will hold the real estate and then wants his 40% ownership held by a newly formed anonymous LLCThe down payment capital is in the LLC and the high-income partner is guaranteeing the loan.Is It possible to get a mortgage with that structure? 

3) AnonymityMany landlords are able to retain a level of anonymity behind an LLC. pretty tough to do for me as an owner occupant.1) and 2) are by far the most important reasons I do not use an LLC in my personal investing with house-hacks.

Create a Nevada LLC - (or any state that offers owner anonymity) i.e. 

I established a mgt co S-corp a year in 16 years ago and am glad I did.I did it to have a higher authority to check with, anonymity (no rents or 1099s in my name) and retirement plan options.  

Always encourage the reporting tenant to call the police (they can remain anonymous) 

That is the anonymity of the interweb.Additionally on this forum you are dealing with a lot of people that have developed leather tough skin from repeatedly having to deal with a hole tenants.

All properties need to be in trust to provide anonymity and transfer ability without re titleing asset.

Anonymity does have it's benefits, though, if you can achieve it.

Trusts, other corps and LLCs cannot be shareholders, so people who are trying to gain anonymity are unable to do so as at least one natural person shareholder needs to be registered with the Secretary of State (in most states).There are several additional reasons, but honestly you could write a book about it.  

I would call the police and report anonymously if you don't want to be involved.