Sharon wants to create a hotspot so she can have Wi-Fi on her laptop. Leo advises using a MyFi Wi-Fi Hotspot card, which are available through her carrier. In general, she'll be charged an extra $30-50 a month. Leo says it's likely cheaper to go to an ISP and wire her home for internet. DSL Extreme has $13 a month deals for the first year.
(Disclaimer: DSL Extreme is a sponsor).