To set the scene: A cost seg study breaks your property into two important categories:1250 "real" property aka the building, foundation and other long life assets.1245 property aka anything that can be accelerated such as 5, 7, or 15 year property like carpets, cabinets, or other site improvements.

What rate, term and amount borrowed did you get for the ADU build and what was the cost?

Get your basic estate docs in place before building a complex entity structure.  

Congratulations on building such an impressive portfolio at such a young age and achieving so many successes!

I'm brand new to Bigger Pockets and just recently moved to Los Angeles County.

If you acquire one new property each year, you could significantly increase your wealth and potentially position yourself to qualify for larger investments, like apartment buildings or construction loans, within 10 years.I’ve worked with clients who have successfully implemented this strategy, and it has proven to be an effective path to building long-term financial freedom through real estate.Good luck with your decision!

Brand new to real estate investing - I currently have 1 3/2 ranch in good market  (Greensboro/WS/ Highpoint) used for furnished medium term rentals. 

Plus I recently got a brand new calculator, wanted to see what out of state investors though the most important aspects of deciding between to similar rates cap rates in 2 varied size apartment. 

Could you go reinvest it in another property to build even more income?

If you'd ask this question while still employed I'd say apply the $8500 toward knocking down the debt quicker but since that is not the case I would build up your reserves to about 6 months then begin applying those funds to bring down the debt.