What business model do people use?

Morning or afternoon,

Im looking to get an idea on what people are charging their clients to build/maintain their applications or what business model they use in order to service their client base.

Im trying to put together a price list for my self and don't want to blow numbers out to be rediculous. After conversion just for a single license it would be $151.92. So for say 10 people in a business that may need their own log on this would be $1,519.20.

Has anyone had any issues with going over the 2gb limit?