My son prefers bottles and now with me working I am almost exclusively pumping. The only time he happily nurses is in the middle of the night. Since I pump so much now, I am slacking on housework. I have a plug in Medela and I can't afford to buy one of those nice clip on ones. Any tips from exclusive pumpers? Formula would be more convenient but I don't want to do that. Plus my son is already in the 80th percentile for weight. I feel like he would get huge on formula.