Hello, we are looking to buy a property and it has pull chord lights in the bedrooms. We are not sure if it is a huge cost to replace that with a wall switch. We are new to all this and have no idea on the cost to make such changes. I am assuming it will require creating way for the wires to the new switch on the wall so potentially a fairly big replastering and decoration job involved? Please if anyone can suggest the potential cost to carry out the replacements. Thanks.