Even hiring more staff just before launch doesn't really solve this problem. If you've got good code and tested the product well the quantity of emergencies at

Even hiring more staff just before launch doesn't really solve this problem. If you've got good code and tested the product well the quantity of emergencies at launch should be quite low as unless you are launching a new product to a lot of existing users you're unlikely to get a large amount of usage at launch. As you scale up your customer base and your business, be sure to think of your lone developer first and provide him with extra resources (and you with less risk) by increasing your development team. Good luck!