It may be possible, but I would say a 2 or maximum 3 round series. It is a massive amount of work to host a National, as I am finding out and we already struggle to have enough tracks to hold Nationals. But maybe not even call it a series, maybe a Grand Prix, or something like this. But would think a smaller amount of races to start would make sense.
But a good idea

As long as it doesn't take away from regionals