Personally I did not buy any pump when I had given birth, like you had mentioned in case encountered problems with bf. Hwever I got to borrow an electric pump from my friend first. After giving birth, I directly latched my son to my breasts. For the 1st few days, breasts only produced precious colostrum which is very good for baby and my milk came in during day 6 and I continued to latch my son to my breasts as to increase supply = demand. The more you latch, the more supply of milk will b able to meet yr baby demand.
Initially, I struggle with bf and had to resort to FM for some feeds but eventually I overcome it and able to bf him exclusively. So be prepared, there will be sore nipples, engorment and be careful if you had blocked ducts as it can leads to mastitis. (No one mentioned to me before that bf will be this hard but I persevere and overcome the odds) This will be the time, you felt like giving up bf but bcos of the benefits of breast milk to baby, you will find yrself in a dilemma.
As you will be returning to work and stil continue to bf yr baby, I wld suggest dat during yr maternity lve, pump out yr milk after every feeds to store for ebm and at the same time it will increased yr supply too.
For pumps, I prefer the Medela swing pump(single/ it comes in 2 pumps also) as it is lightweight and portable to carry out, ideal for me to pump @ work. currently expo is selling S$399 include free gifts cooler bags with ice pack, 4 bttls and a carrying bag. Without free gifts it is retail at S$336. At hm, i wld use the Medela freestyle electric dual pumps that I borrowed from my friend. I had tried Pigeon manual pump but it did not work for me cos my hands felt tired pumping so IMO electric stil the best - efficient & fast.
Hope I answered some of yr concerns
Anyway no worries, just post yr questions here, there will be helpful and experienced mummies to help you out.
Had a smooth delivery and good luck to yr bf journey