Yes ^, that assumes the purchaser has enough other semi-liquid investments (yes, including cash), stocks, mutual funds and bonds that perform at a better rate than 1.99% annually. No, not just cash.
It's not that hard for those of us with strong tech stock portfolios to exceed an after tax gain of 1.99% annually, no big accomplishment. If your wife's CPA financial planner can't do that, get another one (consider a well-qualified advisor, even if non-CPA). btw-I don't do much consulting, although I've done some for corporations at a very high billable rate, (lol, no thanks, I'll politely decline on being your wife's financial planner).
Yes, leasing makes more sense for some self-employed professionals for tax reasons (as mentioned in post #4). And buying new lux cars is very expensive with any method of payment/financing (as mentioned in post #5)