yeah 2k is about right but thats the minimum doing all the striping, keying masking etc your self, it'll cost for a decent jobe specially going to a completely different colout, all the lights and glass will need to coume out and a glazier would need to do that about £150 for the windscreen going in and out. , but you will need to basicaly strip the car down to the shell, even removing the engine, or else you will have a nice maroon engine bay and silver body, you will also need to remove the door, bonnet and boot.
its probably alot easier and cost effective, to get another car lol.