I am also a live in landlord there.I am not a seasoned investor,but I am exploring other investment opportunities in the mean time I am just strategizing to optimize my profit when I sell.

Think strategically by block and not by house.  

Paid some debt down, but paid cash for strategic land locations for potential growth or resale.  

I want to take the next step and keep educating myself for the next few months before any strategic action is taken.

Fannie Mae has a guideline that if the Authorized user account has a significant impact on the credit profile (i.e that is where your score is coming from) then it requires Lender to either make the case that it isnt or proceed with non traditional credit (4 utilities paid over 12 months).In terms of building  your credit score,  I would be strategic about building out a more complete profile.Installment credit- Self Lender, experian boost or a secured loan are great for this.

I'm not looking to get rich, just looking to be more strategic and get a better return than the stock market.

There's also the issue of risk - someone with only 30% at stake, may gamble a LOT more than you would gamble with your 70%.Also, strategize and think through worse-case scenarios for fraud.

We're looking to partner with professionals who have experience in strategic entity formation as we know little to nothing about this side of REI.

In fact, if anything, housing costs are INCREASING (paradoxically because of high mortgage rates), and a major reason inflation is slowing is because of lower oil prices (perhaps because we've been releasing so much oil from the strategic oil reserves).

agree with James Haming, this is a long-term play for Zillow and very strategic to gain market share.