I'm not sure what your training background is or your age (ie, 17 year old lifters donig things right get bigger and stronger than 47 year old lifters. With less fat gained etc.)... but 13-15 lbs. of solid mass is a lot and not really a short term goal.
I think that if you want to go the "bulk-cut-bulk" route it'll take longer, but you may be happier with body comp.
Have you checked out Lyle's forum to see how they're doing it over there?
And if you don't think kettleball squat cleans are difficult, I say, step up to the med-ball
- CJ Kim