If it's a well looked after, good spec RS Turbo, with sorted suspension/brakes/engine and isn't rotten... then you'll enjoy yourself.
If it's a normal spec one (sub genuine 200bhp), even if it's in good condition, then after you get bored of the steering wheel twisting your wrists to shreds... you'll strap on your lead boots, head for one of the bridges over the Tyne and take a header over the side.
I understand from your posts on here that your Cossie isn't one of the best about, but in your position, I'd save some cash and get it booked in with a specialist for a complete inspection... then when it's done, take the car off the road and set about getting hold of all the parts which they recommended were replaced. If it takes two years, it takes two years, but at least you'll be well on your way to having a solid Cossie to smoke around in and not be constantly throwing cash at an old RS Turbo to keep it on the road.
Cheers,
Grant