Is saving 5$ worth the effort of your arm pumping for the single bulb to squish, then you'd still have to separate - with another tool and more effort. How do you get into the edges? Not to mention picking out the green stains or do you just tell them it's relish?
For the few times I do ground beef like that, I just use my potato masher, the ziggy zaggy type. Or more fun, two arm ratta tat tat, with two wooden spatula, really fast and actually sort of fun, especially for those of you who cook with music!