I just got back to work at 16 weeks, though I pumping all the milk for her to eat at daycare while I am here so it is a little different than your situation.
I highly recommend getting your pump(s) before you give birth and putting them together and read everything so you only have to refresh that knowledge after your baby arrives. On little to no sleep, every bit of preparation helps! I wouldn't worry about pumping the first 2 weeks at least (barring any problems/engorgement), just let your baby nurse. After that, start slowly and don't worry about getting much at first, get used to the pump and figure out how to best stimulate let-down and all that on the pump. Freeze what you do get unless you have an immediate need or want to try introducing the bottle.
As far as the bottle goes, I fed my daughter bottles and she took them from me fine, so don't be afraid to try it if you want. Some babies won't take them from Mom when the breast is there, true, but mine didn't mind. Introducing between 4-6 weeks is recommended to avoid confusion too early and rejection too late. I introduced a bottle at 3 days myself because she was such a sleepy baby she would only suck for 2-3 times and then fall asleep and be impossible to keep awake, so she wasn't getting much from the breast at first. I could have done finger or syringe feeding, but it worked out fine for me luckily. She actually latches onto the bottle just like she does the breast (well close as is possible).
It doesn't sound like you have need of a huge stash, really most people don't need one as ideally you pump anytime your baby gets a bottle and do some extra pumping after feeds for emergencies.
And yeah, definitely get a LC to see you as soon as you can. I didn't see one until the day I left and I had thought things were going pretty well because I didn't realize she wasn't really sucking after an initial 2-3 sucks since this is my first until the LC watched things. The nurses at my hospital were morons about BFing and said things were fine

so don't necessarily trust the nurses on this.