You don't need to take a guru class to learn land development.

One of my STRs was in an old area that had always been very lower middle class, manufactured homes scattered throughout.

I'm in the same boat in the Nashville market.

It was a MASTER CLASS!

I have window units in my 4 unit that is in a upper middle class part of Chicago. 

Could be buying other investment properties or other asset classes. 

You would use a different class life for the refrigerator as it is not going to last 27.5 years, and usually that's 5 years. 

I am in same boat, looking for property to buy in smoky mountains.

-STRs were essentially eliminated by the city, removing a potential investment class of properties-MF went from non-existent to overbuilt-Flips have been hurt by high interest rates and brutally low appraisals.

Near Centerville/Kettering you can find some great A/B class properties with good tenants.In terms of cash vs financing, if one of you is a US citizen, you can still qualify for a conventional loan with your current income.