Given that its a single speed, you should actually have less of an issue with broken spokes. Less dish=stronger wheel. I've never had an issue with broken spokes, mostly because I weigh 120 lbs. I think if I did I'd have to be on an 11 speed wheel with a fully loaded touring setup. Even then I'd have to be kind of rough to break one. I would suggest just tossing the wheel and buying a 36 spoke double wall rim. It may be tough to find one for a single speed in which case you should find a professional wheel builder or make your own. That will probably be cheaper than replacing spoke after spoke.