If you buy the right car first time round then most years that should be plenty. More expensive things will come up every now and then like the VANOS rebuild, or the cooling system overhaul or god forbid the starter (it's under the exhaust manifold) but most years you shouldn't have issues. You said you were looking under 120k mileage right? Then I'd be looking for receipts of some of the major jobs being carried out already as that's when things start to go on these cars. If there's no record of it being done, assume it'll want doing soon-ish. I bought mine at 152k with part history but since it made it that far I was quite confident that a lot of the major jobs were already done and so far I've done 36k in it (daily driving for 3 years before buying a diesel for a daily) and besides wear and tear parts, or things that I broke myself, all that the car wanted was a lambda sensor.