Job Description

I'm new here. We are interested on JomSocial. But we have still some outstanding issues.

I would like to know what it would cost to make an extension.

It should be possible to build a team together. An user have the option to create a group with only 4 people. The group is then displayed on a site where the other users can apply for this group. The founder of the group can then choose 3 User.

Is this possible and if so, with what kind of effort / cost I have to expect?

For your offers I'm very grateful.
It helps me for or not for JomSocial to decide.

When should the work start in 2 weeks.

Sorry for my english.;-)