Yes it is still good to budget on all your money coning in. it would help you spend it in a wise way to avoid a wasteIt mainly depends on you, even in a situation where you where not expecting any money, you can still decide to budget on it when it comes.
i agree with you tips receive are income. You can use it in whatever way, its depends on individual decision.Any grant or tips receive are income. You can use it in whatever way, save it or make investment. That depends on individual decision.