That's still an expensive way of doing it (every 3) and you're still limited- what if you need to get out sooner, what if your situation changes and 10k/year ends up being 15k/year, but you don't want the car anymore? Then you're almost certainly paying more, which is why I say when you can afford the car you want, buy it, don't skimp, buy the damn bells and whistles if you think the those added features will keep you in the car longer and you'll save a good chunk over time and be able afford nicer vacations, retire a little sooner, etc- it really does add up. If you're halfway to a seven figure income or so then yeah whatever live large.
6MT-Montego/Terra 128i ZSP
Save the manuals, bring the diesels BMW!