travel alot to langkawi for the pass few years working at alor setar
i would recommend u the best budget motel at pantai cenang
Malibest motel and sandy beach motel
Both hotel are better than most of the budget motel
plus white sandy beach, its different from other motel (its different, u ll know it when u feel it)
they offer some big family rooms which can stuck in alot of people (depends on what comfort level u want )
Right in the middle of pantai cenang, all the activities is there.
get more beers and liquor and drink till u drop and sleep on the beach haha

i m going there on july too with my wife but this time i want 5 star hotel