I wonder why you hated breast feeding? I LOVED the experience and felt myself bond stronger to my two girls (one I breast fed 1.5 years, and the other 3) than my son who only fed for 6 months.
Anyway, you have to pump MORE than you need, because I found with pumping alone, you don't get as much milk out as you do when the baby is feeding. I pumped because I had to work, and I did that AND breast fed both my girls. I did formula AND breastmilk for my son because I didn't have enough milk production.
As soon as the baby is born, you will have to start pumping or breast feeding. You need the colostrom in the breast milk that comes out right at the beginning. This helps protect baby's immune system. Even if you breast feed at first, oftentimes, the baby will switch over to bottle later. I don't know about you, but after delivery, I'm exhausted so I don't think I could stand the thought of pumping right away.
Once you start pumping the Medela breast pump that pumps out of both breasts at the same time, was my FAVOURITE by far. However, the baby sucking milk out is MUCH more efficient than any breast pump. But, it's still better to pump than not breast feed. Still, then it's twice the time to get that accomplished. I kept getting low on breast milk with my first daughter and the pump helped maintain my milk production.
The other problem with formula is it does not have the nutrition needed for proper brain development. NOW they are just starting to discover that, and putting DHA into breast milk. (see http://www.yoplait.com/kids_nui_dha.aspx).
I hope that you can overcome your revulsion of breastfeeding. It will save you OODLES of time.
God bless you for trying.