Right now, apartment/commercial rates are historically low (low-mid 3% range).

They typically don't consider historical or projected earnings.

Commercial Space in mixed use zoned Historic Home with 1BR/1BA Airbnb apartment attached.

Purchase price: $179,000 Cash invested: $30,000 Sale price: $204,000 First-time buyer of single-family residence who completely renovated a 1900 historic home and created an Airbnb property management business offering rooms to students, professionals, and tourists from around the world.

This exemption was historically called a golden duplex exemption. 

Both homes are in historic areas of OKC.

If you expect your taxable income to grow beyond your W2 income levels, and we presume the historic low tax environment will be higher in the future, it is best to pay tax today because it will be less than paying tax on the same amounts in the future.

I am going to pull/FOIA as many historical documents as possible for hopefully even more ammo towards a 3-flat.  

We needed a second home close to my husband's office....and we love antiques & historic homes with character.

But with millennials just starting to buy their first homes and interest rates at historic lows even if they raise rates to 5%, demand will continue to be very high.