During this time you are not generating any return from the money invested in the ADU.

Commercial Revenue Generating properties like office buildings, apartment buildings, retail centers, etc (banks call it "CRE" lending) are typically evaluated from their net operating income, not gross.

Quote from @Brendan Jones: I am very new to learning about real estate and am looking for advice on my first home and how I can best use it to help offset my mortgage and generate cash flow.

Now I'm not gonna be Mr Tour-guide for any/all who want to stop out and just look around but if you go through the steps and are serious, we have built out acquisition strategy HECK-YEAH I'm gonna say come-on-out and we'd carve out some time to do market tours together AND I'd equip you to do some self study/exploration. 

Any ideas on what I could turn it into to help generate some extra profit?

The second you are introducing metrics to change your marketing that have nothing to do with generating the leads you need, you introduce uncertainty to your systems. 

For example:-A tenant complained about the AC not cooling, so I replaced the entire unit with brand-new equipment.

Where we expected to gross between $30-40k, we are grossing $60k and generating around $2000 per month in cash flow.

Sometimes, there is also a tenant already in place which means you can start generating rental income from day one.

Over the past decade, I’ve built and managed purpose-driven homes in CA that serve communities while generating stable, long-term cash flow.In addition to running care homes, I also consult with aspiring care home owners across multiple states, including Texas, Arizona, and Michigan (Detroit area).