First, let me say that I know enough about Rally driving to be dangerous.
So, I am NOT an expert and I defer to any and all with more experience.
That said, I do have some friends here in the DC area that Rally and Rally-cross pretty regularly.
Because of the expense, a lot of them are using the Hankook R201, 202, and 203 series tires.
If I remember correctly, each series can be had for about $125-$150 each depending on size.
I have no idea if they are even remotely competitive, but they seem to be the tire of choice in this area.
Just throwing that out for consideration.
FORMER Avenging Moderator of the Apocalypse and Leader of the Axis of Oversteer
"I live with fear every day and sometimes, she lets me race."
2002 SVT Focus... Stock