Admittedly, my wife thinks I am pretty cheap. That being said, who needs to buy some fancy breast pump system when you could buy one of these:
Breast Pump Attachment to a Household Vacuum Cleaner, USPN 6,093,168.
Maybe this could go into the “Inventors you’re glad you aren’t married to” pile. “Honey, can I borrow you for a second? I need you to try my new invention out.”