No 4:

The strength of your relationship with family members and friends, and support you are likely to get from them. If you have a supportive family and network of friends, developing a new business is always easier. Not only will they give you the encouragement you need—and there will be times when your confidence will need a boost—but they also can lend a hand. For example, it’s good to take someone else along to viewings to get a different perspective, or to sound out a project with someone with a construction-related skill.
On the other hand, trying to encourage or persuade a partner or spouse who may be reluctant to use the equity in the family home as the seed for a future business, can cause of friction and unhappiness—a factor which you will have to weigh up, just as you would any of the risks involved in setting up a new business.