There does not appear to be a trade or business component that would be subject to Unrelated Business Taxable Income.Your numbers in paragraph 1 are not correct and represent an oversimplification.  70% of your IRA's fraction of the gross income will be taxable, then reduced by 70% of the allowable deductions.  

I heard about the benefits of compound interests and lower taxable income.

You're creating taxable income for yourself for no reason. 

The Tax Cuts & Jobs Act (TCJA) changed the game.If you are "phased into the limitation" regarding the 20% QBI Deduction, and reducing taxable income below the "threshold amount" isn't an option, an S election's ability to page out wages to owner-employees makes S Corps even more compelling to make sure you're maximizing your QBI Deduction.Best to have a meeting with your tax CPA/EA before year end and make sure you're still on the right track!

Will give owner's name and taxable address (good for getting ahold of absentee owners).

Liquidating the stock on the front end to pay for a property would be a taxable event and quite costly.

If you sell it upfront in a fully taxable transaction the gain recognized should constitute taxable income to you in the year of sale.

Employer profit sharing / matching contributions can be converted into Roth by including them in taxable income in the year converted.4.  

You could argue your net taxable income is lower, but that is because of lower cash flow, not higher depreciation.

I highly doubt that you are going to fall in that 0% bracket because your taxable capital gains plus your other source of income (May be W2) is going to be well over the threshold of 0%.