I have a feeling my thoughts & imagination would not be a popular one on here, after seeing what you guys are thinking. But here it is and I'll explain why.
1) Baja 500 in mid May - early June
(Not sure if this is even possible? Think old Score/HDRA Parker 400 format where you raced both the Cali & AZ sides)
2) Barstow to Primm - Vegas to Reno; Start in Barstow and race to Primm. Then have a set time limit to service & trailer your race car from Primm to Vegas to start the second stage to Reno.
3) Baja 1000 mid Nov.
Make the series about the Big 3. Leave the shorter filler races to the other series. Also everyone races the full mileage and the time limit is based on class & vehicle speed. Faster classes have less time limit vs a slower class.
The thought & imagination behind this is more races is not better. Make the series about Prestige, Endurance and Demand. You will get a huge draw if you put on great races, yet limit your exposure. Plus the cost to race 3 events like this is pretty much going to cost you what a current Score series is going to cost you. You could also think of the Barstow/Primm/Vegas/Reno as two races in itself.