@Emily Anderson true on the flat 24% tax rate on rental income without the possibility to deduct costs from it.
Keep only one thing in mind: rental income is being added to regular taxable income (salary and rental income).
So I could deduct costs before ending up with taxable rental income, however for me, it is being added and calculated together with my salary income.
That means I'm easily reaching higher tax brackets even after the deductions, while with a flat rate it always stays the same (even if you earn way more rental income). Not before that long it could become more interesting for you than for us here.
Now, for us building a portfolio of rentals (and btw also an option for Americans), we avoid this by not doing it as an individual but with a company (SL) and changing it to company tax (first two years 15% and after this 25%) and creatively deduct way more costs.
It is true though that this is a good way if your strategy is to reinvest your money time by time building something bigger/passing it along to kids/relatives etc, because when you want to take money out of your company you would need to pay dividend tax or in the form as a salary.