Welcome to BP - this is a great platform to initiate your real estate journey.Dive into comprehensive guides, connect with experienced professionals, and explore a wealth of opportunities that can help you achieve your real estate goals. 

For Fannie, a "fully functioning kitchen" defines an ADU: https://www.fanniemae.com/content/guide/selling/b4/1.3/05.html#Accessory.20UnitsFor California, a "junior ADU" has 120V electric, and only maybe a separate bath (!)

Your point on deciding which sacrifices you want to make seems like good guiding words when considering different investment opportunities.

Since you’re leaning toward the “reconnect with nature” vibe, are you thinking of adding features like hiking trail maps, partnerships with local guides, or even some eco-friendly touches to the property?

Does anyone know of a vetted property manager that knows the market and area to help guide me through my first purchase?

Michael,   A good book to purchase is "Professional Real Estate Development: The ULI guide to Business.   

I do not see how anyone can use your experience as a guide without specifics to learn from. 

Table 1-4 is the Rollover Chart in IRS Publication 590 that can guide you.

Here's a detailed guide on how to screen applicants: Application Screening Guide 

I'm getting asked constantly about different neighborhoods and cities in Cleveland so I decided to make the most up-to-date graded map of Cleveland to serve as your ultimate investment guide.