I'd ride the bike with the stock wheels until you had an issue. If anything, just get someone to check the spoke tension and perhaps increase it a bit for your weight. Ride light and I believe that the stock wheels shouldn't be that much of an issue. Spend the time afterwards saving for something better if you think you want it, or saving for some new wheels. I rode 32 spokes while commuting to uni many years ago, when I was weighing in at 150kg/330lb. There was a little off road section, but most of the ride was on road/paths and I never had a problem with the wheels.
Perhaps also consider the Sedona if it might suit your tastes. It comes in a slightly larger frame.