Northern Tool offers this $30 propane torch kit for burning weeds and melting snow and ice. With a six-foot hose and a two-foot handle, you’ll need to figure out a way to haul around the (minimum) 20lb propane cylinder.
The torch kit has a manual igniter, so be sure to pick up a proper ignition source as well. Your cigarette lighter is not recommended.
The trick to getting these work right is to singe the weeds, boiling the moisture in the plant cells above ground to dehydrate the weed to a point of no return. It doesn’t take much to terminate — just a second or two — and you must absolutely be careful when using this in drier fields to prevent flare-ups.
In the winter, once you’ve melted all your snow, make sure to sweep the water off the driveway. Otherwise it’ll just end up refreezing, forming your new skate rink, which will amuse your kids but won’t make the 6:00 am departure for work any easier.