Yup; the Unrestricted version = $99. B3D might not offer control found on more complex rendering tools but Photo-Real is a specialized niche of its own. I invest 95% of the time modeling SKP. Entry-Level rendering solutions seem to fulfill my needs.
Twinmotion was acquired by Epic Games, not Unity. The free version will be available until November 2019, after that you can keep using it for free forever. The new release will be a paid version.
Here is an official FAQ: Twinmotion
The best render that is highly unknown is www.brighter3d.com it is so quick and easy to learn. I use it professional as I get better result than using vray and a load of other sketch-up extensions and plugin.