If the price is right then the miles and paintwork shouldn't matter toouch on the rs,wouldn't concern me anyway.
Where do you see it as pricewise?
Rs turbo are a great little car and fun to drive,have a nice presence and IMO would make a great weekend motor just to take for spin abouts etc.
Make it efi for more reliability as its gonna be standing about a lot and if the steering is a pain you can get a corsa electric steering rack and a very good welding shop to fab it up to the existing escort rack,there's been a few done over the years.





Or put 60psi in the tyres like I used to on the old fiesta diesels !!!!

Really it's up to you entirely.