I believe starting with something smaller will help me build the knowledge I need before considering larger deals down the road.

Quote from @Franklin Marquette: When building ADUs, do they generally create value uplift for the property in the same way that the main house is valued?

With the growth mindset you clearly have, you're building a solid foundation for success.

When building my home, I could easily have added $1M to the price tag by just using concrete and steel.  

He's an agent with RE/MAX, one of the largest franchises with a great training program and a lot of tools for their agents to use and build a successful business.

I have seen people buy non-existant properties, bottom of lake (literally underwater), slivers of land too narrow or small to do anything, Army bombing range, expired leases, cell tower now removed, property with 30 year lease and prepaid rent for 30 years, condemned buildings, toxic waste sites, land under railroad tracks, cliffs, landlocked property, wetlands, flood zone, unbuildable property, endangered species habitat, ....I have three rules for buying at Tax Sale:1.

Are there any similar surrounding buildings?

I am a blue collar guy through and through so even though I'm now a realtor, I can never set my toolbelt down for very long before I'm needing to demo, build, and create once again.

And then a client's new build in the suburbs of Denver that cost $800,000 and should get around $85-$90k, so 10.5-11%. 

Is the property just a regular-style house or something you can build an experience around?