how do i do hourly billing with this plugin

i am setting up a video production business website. all the billing is time and material, i thought the appointment plugin in would be a perfect fit but i am having difficulty figuring out a way to do it.

Also they put packages together that consists of different service at different lengths depending on the type of project. i thought marketpress may be able to help here but it does not look like it.

do you have any ides that could help.

the site i am working on is