It's more expensive, it's more difficult to configure and maintain and it can be more difficult to troubleshoot
Yes, motion continues after forces are no longer being applied. Otherwise, a ball wouldn't continue to roll after it left your hand.
No, gravitational forces from every piece of matter in the universe affect every other piece of matter in the universe. Gravity cannot be blocked.
Assuming no options are provided, Jeremy would do well to create a weekly progress report, detailing what the company has accomplished during the week, and what remains to be accomplished. The report should be goal-based with defined deadlines, and clear explanations on what has been done and what remains to be done, and should be organized by the various aspects of the project (accounting, marketing, etc). This report will help keep his team conscience of their role within the larger project, what they have accomplished thus far, and what still needs to be done.
