At some point you will have a vacancy, and I want to know how hard it will be to fillWhat is the current lease per sq ft rate, and how does that compare to the market? 

I am in the process of buying my first multi-family property with the purpose of house-hacking.

Does my foreign partner need to apply ITIN for tax purpose?

In the highly unlikely event that you have multiple water heaters in the building any that are specialized for a specific purpose would qualify for bonus.

I also go to one in Santa Monica, bit of a drive but there are a decent amount of experience people there compared to most of the other ones I go to.

We are extremely conservative so we are targeting bread and butter three bed two bath 1,400- 2,000 sq ft houses or multi family that can be flipped to a house hacker or first time home owner.How We are using several methods to unearth deals.Scouring the MLS - searching based on criteria and then sale price compared toWebsites and digital advertising (Facebook and AdWords)Direct mail - Acquired lists from List Source (not happy with them) and have been sending postcards to older owners that own SF that meet our criteria.

If you are personally still the owner of the property, what is the purpose of the LLC?

For purposes of reasonable accommodation requests, neither the Fair Housing Act nor Section 504 requires an assistance animal to be individually trained or certified.  

@Elizabeth Wilson The purpose of the question is, if I am looking to wholesale as well as being a realtor, do I need to advertise that in my marketing?

You would need to file form 1116 to claim the taxes paid to PR.PR is a US territory but considered a foreign jurisdiction for 1116 purposes.