When all the manufacturers have left, the rules has to be changed because the manufacturer or the manufacturer’s official team is the only one who can homologate parts. The next step for the rules would be some kind of rally cross rules. Maybe the cars would be cheaper then.

http://teamrs.aeston.no/?vis=artikke...8507&t=Racecar

The cost of this car is about 20% of a WRC car (2.000.000 skr ~ 210.000 €).