RE: When we don't have the energy
Philosophically, if you have a dream, and if for that dream you are willing to risk yourself, then you are an entrepreneur. It is a myth, that to be an entrepreneur you will have to compromise on family, friends, etc. It is also a myth, that you will have to work more than anyone else to make your dream come true.
Also, if you look it from another perspective, working for someone else can also help you achieve your dreams and success. Here, you also have a choice of being an intrapreneur. An intrapreneur is someone who acts like an entrepreneur within a company set-up. They are also visionaries who would like to contribute in their own manner and take their companies to greater heights. I have experienced this road as well.
From what I have experienced, both as an employee and entrepreneur (recently), if you love the things and are passionate about relationships,you will always find a way to invest time and money to make them work.