Instead of spending years learning by trial and error, working with a coach or mentor can allow you to accelerate your learning curve, gain confidence, and achieve your goals faster.

Do you have an idea of how much money you're looking to spend on/invest in a property?

An additional benefit of a detailed engineering-based Cost Segregation Study is that it can increase potential insurance premium savings as well as provide support for the property tax appeals process.

The only additional thing that needs to happen is make sure appraiser makes note of why the value increase in as is vs previous purchase price.

As for valuation, I see no reasons why a Junior ADU would negatively impact additional housing unit.

However, our tenant turned out to be problematic—late payments, issues that led to an eviction, and additional repair costs before we could relist the property for sale.Now, after months of making mortgage payments out of pocket, we finally have an offer.

Is spending thousands on a sprinkler system worth it or do I have other options? 

IMO, the best strategy for that type of individual is to purchase residential property in an area they are or can become familiar with; in an area where the neighborhood is “on the rise”, typically where demand exceeds supply and people are spending $$$ on fixing up properties.  

Ok it might not be 1:1 but it will add additional revenue.

(Call it 20% federal and 5% state ($15k in income tax, plus the $45k in additional taxes you created.).