I would do it lol but it would cost you! But I am 150miles away so no good to you, look for someone local, many small firms will do it, but as above when you get a fault and you cabled it and wired it then you will still have to pay call etc,
Price you pay will proabably be what they would have installed for you, your paying for expertise , I would to test all your cables and check everything you put in....