I did something lidat. Mind you, when I bought 2008 Vios, it only had 3 yrs warranty.
Within 3 years, I serviced with them.
After 3 yrs, it was a mixture of Toyota SC and outside. Most important thing is to follow the manual. If it says xx,xxx km only change oil + filter then I went to nearby outside workshop with lubricant of my choosing.
Just pay attention that at certain multiple 40k or 60k (can't recall), some vital things need to be replaced. Like fuel filter, automatic transmission oil, etc. For this one, I went to SC and followed the checklist.
Maybe can do outside also as long as you follow the preventive maintenance checklist.
Up to you. My 2008 dugong is touching 360,000 soon. No major repairs so far. Just typical wear & tear like replacing suspension, aircon belt, lidat.
Worse nightmare is gearbox rosak or fuel filter contaminate, etc. So far don't have, touch wood.
Of course there are trivial but annoying issues like alarm like to engage randomly (I disabled, otherwise angry neighbour), radio sometimes refuses to on. Can live without these issues but not a dealbreaker for poor fag like me : )
So impression your mileage and mine 2009 ncp93 only clocked 275000KM so far manual gearbox & air-con never failed before. the major issue that i have now is engine oil getting lesser by 1cm every month so i have to top up