Based on your advice to newer investors, should I play the long term game by paying off my house early (2030)?

As Greg mentioned you can do a cost segregation on a STR, LTR, or other real assets but your client may not be able to utilize the benefits of a cost segregation based on their full situation. 

For now, consult a CPA to determine the best structure based on your income and investment goals.This post does not create a CPA-Client relationship.

The guest house has STR rental history but the other two units would need to be based on projections. 

Have you searched your county site to identify those that have bought land in your area the past few years and then contacted them?

The information shared is based on my experience and industry knowledge and should not be considered legal, tax, or financial advice.

I just saw that Antonella Parra Gonzalez, a third-grader at Harris Elementary School in Gilbert Public Schools, recently received the Arizona English Learner Students Success Story Award.Here in Austin, many investors are asking me to set up searches in Eanes ISD, Round Rock ISD (that also cover some homes within the Austin city limits), and then of course Leander and Lake Travis ISD.

An attached ADU in the city I'm working with, based on my impression, is a new build with a shared wall to the existing property, and any conversion of existing space is JADU.

I invite you to search this forum about ADU appraisals.  

@Marcus AuerbachHey Marcus, my RE estate agent says it's worth around 600k based on the comps.