@buggyboat, I think he won't have many issues. This is a comfortable setup considering the fact that capacitors can give an instant voltage spike for ignition. But he will be facing problems because capacitors obviously lose charge and require a battery to keep them charged so if he leaves this setup be for a longer duration of time, batteries will give up and eventually it's going to create bigger problems than the ones he's trying to avoid with this setup. It's a good idea though, with proper maintenance, it'll work.