I'm currently in the stage of analyzing SFR deals, but on realtor/zillow, the tax number I'm seeing is based off someone who's using the property to live in.

Near any City Center you can find a need for Affordable Housing.

Has to be cash for it to work properly. if the cash is borrowed, BRRRR just does not work well because you just pay off one lender with another. the amortization should be the amortization of the loan you expect on the refinance stage. 30, 25, 15 etc. depending on your loan you expect to receive to get cash back out. 

Home is centrally located 10 minutes from Long Beach Airport, Convention center, Aquarium/Downtown and 15 minutes to CSULB.My initial thought was to pull a home equity mortgage to finish the addition and tailor it towards AirBNB & short term room rentals to pay back the loan.

I am in the beginning stages of forming a partnership with another BP member, so I'm looking for some advice or suggestions on how to structure the deal.  

He and his brother (some jointly some separately) own a couple shopping centers, other apartments, a few houses, etc.

Also, do you think a commercial line of credit would be useful at this stage for me, or do I need to have a bigger portfolio to worry about that?

My concerns on whether this is ultimately the place for me for the next 5-10 years center around ROI.  

Here is the link to the virtual tour and some pics I took after staging (staging wasn't able to be done in time for pics, but it didn't make a difference in interest).

Are you open to a shopping center in Desert Hot Springs?