Hey Geoffrey, it takes a little less than 30 seconds on my machine, but that’s rendering with a 1080 and a 660 Ti GPU. On my CPU it takes about 2 minutes. To shrink the time, feel free to reduce the samples to something like 100 and turn on the new denoising feature in the render layers tab.
2. It totally depends on the scene! I’ll usually do the full unwrap and texturing process for prominent assets and not bother when it comes to visually simple assets, Feel free to work however you feel most comfortable in that regard, there’s no “right way” in this case.
Hope that helps!
