The Whitney Nesting Penguin with wood hoops is by far the lightest full drum set made these days . Four drums nest are less than 30lbs ( think a 24 case of beer bottles is 33 lbs).
I had a set of three and stupidly sold them . They are marvellous drums available in a variety of sizes and they come with the Quickframe , snare stand and cymbal arms and Tom mounts .
I owned an 18/12/14 INDe kit and they are light but nowhere near as light as the Whitney kit .
I love the idea of a Whitney. I wanted one for a long time, but I ended up going with a Ludwig Classic Maple in downbeat sizes. To be honest, a 14 x 20 Classic Maple kick in a drum bag isn't that bad...especially if the gig bag has a shoulder strap.
I'd also check out the DW Frequent Flier kit. I think the kick has like a 12" depth.
I've also read about how crummy the Ludwig Breakbeats are, but I played one, and you know it's really not that bad for what it is.