Hi there, welcome to the forum.
2k sounds like a pretty good price for a K reg VR6 with that sort of mileage if it's straight. Definately get an HPi check and try and verify the mileage from any old mots or service invoices (service books can be forged as easily as cars can be clocked). One thing to watch for on early VR6s is the head gasket was a bit weak until they changed it for a better one in about '95. Try and find out if your's has been changed if not then don't be suprised if it doesn't last much longer.
As for the wheels i think you could get fairly wide wheels without arch work as long as they are 16" or less, 17" i think you might strugle.
Check out
www.vr6oc.co.uk for people with much, much more knowledge than i have.
Good luck and i hope you enjoy VR6 ownership!