If you get into the grey zone, and a blue plated dirt bike, much much cheaper.
For ex, I was quoted $1200-1400/yr for the WRR or CRF-L. The XCF-W, which is classified as motocross, not dual sport, yet street legal. $90/yr. I know another rider who got a TE250, also $90/yr
However, unlike the WR-R. a trailer or way to get to the trails is still best. Living in sauga, most trails I figured are a few hours away anyway, and that's by hwy, I didn't want to be on a 250 plank for a few hours, then reach the trails worn out, then ride the trails constantly thinking about the torture on the way back home.