I was thinking more in a safe 3.7Ghz. That is 120 watts from the wall with HDD and RAM. 360 watts should be possible on a good 850w psu. Ryzen has built in GPU, it won't be used anyway with blender render.
Right now ryzen 1700 is at 360€,the motherboard at 100€ and DDR4 memory at 100€. Three times that and it's expensive as hell. But in a production where you need speed and memory then a graphics card with 8-12gb memory won't cut it.
My crazy thought would be to have three of them in one bigger case