Be patient, but one SFH is not life changing.  

Learning is always helpful in life,  such a young age you are taking step for financial freedom.  

This is mixed use as well as storage would be mixed use.. so check your zoning.. and insurance.. 

Life is not a race, 2-3 years is nothing, enjoy yourself.

You and your family would basically be covered for life.

In general states with income tax (CA) should avoid doing RE investing in states with high property tax even though I know of some San Diego RE investors that appear to have done very good investing in Texas (@Cody L.).Your cash flow on the Texas properties do not appear to have cap expense or vacancy factored in (and possibly not insurance or maintenance). 

So here I am, continuing my education and improving myself to continue living the good life!

There are still some things I am sort of "guessing", like the expenses (insurance, sewer, etc), but it's helping me learn where my gaps are in the analysis so that I know what I need to focus on.  

Have there been any insurance claims on the property?

The flat fee should be his insurance against you "wasting" his time, and if anything it should be refunded at closing, not charged.