The answer to 'what size electrical repair do I need' is that the size of the electrical repair you need depends on the specific issue and the electrical system in your home. For small repairs like replacing a light switch or outlet, you may be able to handle it as a DIY project. However, for larger electrical work or anything involving the main electrical panel, it's best to call in a professional licensed electrician.
Professional electricians can assess the full scope of the repair needed and ensure it's done safely and up to code. They have the expertise and tools to handle complex electrical work properly. Trying to tackle major electrical repairs yourself can be dangerous if you don't have the right training and experience.