Twin mom here - If you haven't joined a club for parents of twins, I strongly recommend you join one. I'm a member of NVPOM (
www.NVPOM.com) and always get awesome advice from the over 500 family members. Parents of singletons always assume answers for twins are the same as one baby but trust me they aren't. Pumping for twins = you'll need the same equipment but you'll need to be super dilegent to EBF. I pumped every three hours round the clock for the first four months (kids were 6 weeks early). Get or rent the very best pump you can ...you'll be spending a lot of time with it!

Good luck!