VA law just requires US mail. 

Here is the quick question: My mother in law is looking to sell bare land in Idaho that is owned outright.

Those of who warn people about his business practices always come out right. 

For example, tenant selection is crucial to minimize issues down the line, and it's essential to know fair housing and landlord-tenant laws, especially if you’re considering investing in a state like California with stringent regulations.You may want to consider starting with one property and exploring property management services if things get busy.

Then start the painful process of trying to notifying, move/store and auction off the abandoned property.I've thoroughly researched the SB1079 laws and qualify as a prospective owner/occupant since we honestly plan to use the home as our primary residence.I guess my primary question is, is there anything I seem to be missing and need to look into?

Texas home equity laws are different then the other 49 states and do NOT allow for these arrangements.

Just be sure to optimize for location within that market as much as your budget will allow and also make sure you are compliant with local laws. 

@Ananth Subramanian follow your lease terms and landlord/tenant laws.

More often, I see people in Chicago using the MTR strategy to side step the STR regulations.I've considered buying a SFH with an in-law arrangement in Chicago to use as an STR because to me that seems like the best way to employ the strategy.

Our law firm is seeing an increase in eviction filings this year.