Sure it's okay that you'll hire someone and pay him/her to tackle all the details and issues; but many couples have made this costly mistake of leaving all the work to the coordinator. Not that the coordinator cannot handle it or that he/she cannot be trusted; it's just that it's not reason enough to let someone handle everything. It is ideal that you and your wedding coordinator have each a copy of your wedding checklist where you can tally each month or every 2 weeks as things progress. Yes, it is tedious and it could bring stress once in a while, but you've got to be always on top of the situation because it is your wedding. You need to have an understanding with your coordinator regarding the updates and tallying of details in order to ensure that every bit of detail, big or small, is being tackled and accomplished as needed.
There is a common practice of making newborn checklist of all needed things for a baby. As a rule it is written by parents with the help of soon_to_be grandparents as the most experienced experts. The newborn checklist helps to focus on the most important and practical baby things. Some items really become a surprise for new parents since they might not be aware of them.