My plan is to househack by staying in one unit and rest out other three.

We ran title and there was recently a $20k lien filed by a property manager. 

With that in mind, if you are still interested in these areas, it will, by and large, be an appreciation-based investment. 

I'm coming up on 2 years of income produced by the property, any suggestions on how to get a lower interest rate without using personal income?

However, I had insurance coverage that I was advised was appropriate and I operated by what I understood landlord/tenant law was and used professionals.

I'm looking into moving to Houston Texas so I can purchase a Fourplex or triplex and house hack by living in one of the units.

If a legal issue arises, only the assets owned by the LLC (the rental properties) are at risk, not your personal assets.

Take that number and multiply it by 12% and that’s your allowance for marketing per deal  Take that number and divide it by your historical lead cost.  

The county assessor has it as $502 but says that is a placeholder for all land values in the Pima County area.Our next option is to find a RE professional who can perform a limited scope land appraisal by pulling land comps from the area. 

How does their track record compare to their past forecasts.I highly suggest the book by @Brian Burke On passive investing 'The Hands Off investor"