I have been business for years. Both Small and large.Keep it as small as you can the more employees the more you waste your time taking care of them. Pay your self weekly and make sure you understand that You are a business expense. If you don't pay yourself you are distorting your expenses. Same as your goods. They are the price that they are.
Keep accurate records and decide how much you want to spend in a year and do not deep into your household money. Don't expect to make a profit for at least 3 years. REMEMBER PAY YOUR A SALARY for all the time you spend/ Post office, Paperwork ETC.