Tax savings is such a difficult thing to calculate because it changes from person to person. Every person’s situation is different and so I just used a generalized tax savings calculation.
But yes, I did just use straight line depreciation.
Also, note that I used the entire property cost ($117k) to calculate the depreciation. Only about 80% of that $117k will be actual depreciation (because you can’t depreciate the cost of the land itself, only the building). The rest of the 20% will comprise of the interest deduction, the expenses, chattel depreciation.