Aw, I'm sorry breastfeeding didn't work out for you and Aricyn. It doesn't sound like you had much support from the midwives at the hospital
Expressing full time can be really exhausting (yeah I now having a baby itself is exhausting!) I did it for the first couple of weeks with DS, as well as trying to breastfeed him. While we did end up b/f in the end, I had a very supportive LC and MCHN which was great cos of the very difficult b/f journey we had.
Anyway, for the first week I was expressing every 1.5-2 hours because DS would not attach at all. It didn't help that it took 5 days for my milk to come in. I think you should see if the ABA have any info to help you out. Because a baby feeding gets more milk out that you can by expressing, I'm not sure of the longevity of F/T expressing, but Im guessling that like everything its different for everyone.

It might be worth having a chat with an LC (a good LC is not just going to try to convince you to breastfeed if you have really decided you don't want to , but should still be able to advise you) anyway to get an idea of the road ahead!