Those are great plan Bs for your habits, Brian! 🙂 Make sure that your planned exceptions are just one-off events. If they happen too often, then you need to plan your day around them. If you get called to your family business in the afternoons often, you may need to schedule your practice away from the afternoons. If possible, you can try to do part of your chores in the morning and part of it after lunch so that you can practice playing the guitar before lunch.