I'm still tossing up between cars! Unfortunately life got in the way so I haven't managed to go car shopping yet. The price of the Holden Trailbrazers has dropped significantly (for obvious reasons). But would it be safe to consider buying one as a long term car? I'm talking at least 7 or 8 years atleast..
For one, your mad if buying new(because you said trail blazer not Colorado 7).youll be throwing away 15-20 of value straight away, and the Holden used market should now be inline with the Holden new prices(as in as cheap comparatively).
If buying a used Colorado 7, stay away from 2015 ones, they had bad tolerances in a new factory and use oil. I've read the earlier ones are better for some reason 2013-14, but I don't think there's much in it. The newer ones 2017 on I think have some issue with gearbox electronics or something. I don't think it's a major thing though. All cars have issues, so don't read too much into that.
As loving of Toyota I am, I don't think the newer Prados reflect the brands reputation. My 120 petrol was a cool car, but after that I think they went a bit fragile. Mine was on gas that is sadly getting phased out, and although it had an outsmarted valve saver additive going in, at 170000klms I was getting nervous. In reality, I should've just kept it. I sold it and went old school back to 80 and 105 series Landcruiser, great in the bush and reliable, but always replacing shit cause it's old and probably not as good handling. I didn't want to stuff about turboing one,and it was exhausting towing, and although fun to drive being slow, as it's like mountain biking where you try brake late, hold corner speed etc, gets trying after a couple of years. Great in the bush, but in reality that advantage ads up to a few days at most per annum where it made a difference, and can always winch out anyway.
But back to your question, if buying new, yes warranty may be a pain in the arse if needed, spares are expensive anyway. I'd buy used, forget warranty, service yourself with penrite and with four wheel drives, spending less equals less stress.