If getting after-hours business calls or workday personal calls is a problem, it helps to have a separate business phone line, or at least an answering machine or voice mail, to take the incoming calls. This also gives your business a more professional appearance to clients than if you and your family make and receive calls from the same phone line.
One of the best home businesses for building cash is online auctions. Some people have no money to start their business, so a great way to get it is by just having a yard sale. Homes and garages are notorious for containing unwanted and unused items. By selling those items, you can normally make at least 0, if not more. So, take that 0 and buy some wholesale goods to auction online. These are great because you pay pennies on the dollar for something you can resell at full price. You can keep selling, investing back into more product, and so on and so on. Each time you will be making more money than the last time.