Well you go the disposable route and get Kogan as a lot do and it will only cost you $100. Going a bit further upmarket, we just bought a 22" TEAC combo unit with USB PVR and DVD which has very low power draw and bought a socket from Jaycar and made up a 12 volt lead. Camec have a more expensive TV which is meant to have a coated circuit board for marine and automotive use.