ugh, after going with laminate on my cab, there is no way i would use contact paper(that's just me, though).
i, too bought mine at home depo for $45, and needed two sheets to cover all of my cab. if you ask me, it was well worth it. they also sell smaller pieces for about 12 bucks, i think. either, way, if you want that durable, professional look, then laminate is the way to go.