It's used to be that holding a CIFR was sufficient to qualify you for a NVFR
As long as you have done the night cross countries required for the NVFR. That wasn't done as a part of an Instrument Rating training unless you
made a point to include them. Which is what some people did back in the day....
I did see a website today advertising NVFR for just over $5K. That was all the flying, some SIMs, briefings and Test.