That living is about 200m², I consider large a scene almost an order of magnitude bigger. I work mostly for institutional clients(especially in UAE) and their home can be massive. Larger rooms can be 1000m² or more.
My scenes can be massive(here is an example of a small/medium sized scene: https://www.c4dzone.com/it/forum/viewtopic.php?f=12&t=33639 ) so GPU rendering is not for me in general. Since Octane will be free I'll try it on some very small projects.
it's going of topic and idk if it's good to ask but, what class of hardware are you using to render and how long can render times be? ball park numbers are all i want.
i do love to see someone doing complex work, makes me happy
A 4K(4096px) render of that scene take about a couple hour using 5000Cinebench15 points hardware( nMP8core plus a couple old PC slaves). A single 28core 7.1 should render significantly faster than that but honestly render time are the last of my problem, what slows me down today is storage IO and system bandwidth, otherwise the 6.1 has been a solid nice silent little machine.