I must have missed the beginning of this story. Your Mac doesn't have a floppy drive? Or it's broken?
Like Blinkenlightz said, all Mac floppy drives are auto-eject. Whether it's manual or auto-inject doesn't matter too much, except if you put a manual inject drive in a computer that originally had an auto-inject drive, the opening in the case may not be big enough to easily push the floppy in all the way. You can still do it with the edge of your finger, though. I used to have a Mac setup like that.
If your family is truly struggling to afford a week's food, then I'm sorry to hear it. In that case, your extra cash is probably better spent on things other than floppy drives anyway. But if it's something you REALLY want, there are lots of ways a smart person with enough spare time can earn a little money. You obviously know something about classic Macs - there are tons of opportunities on eBay to buy things that are priced too low or are mislabeled, and immediately resell them with a better description for a small profit. Or buy old Mac parts that are "broken", many of which are simply missing software or other parts, or just need a good cleaning. Or depending on your neighborhood, you can likely earn some extra money babysitting, or mowing lawns, or running errands for neighbors. When I was 12, me and two friends put notes in about 50 neighborhood mailboxes, advertising ourselves as "helpers" for odd jobs, and got a lot of phone calls that led to work raking leaves and washing cars and stuff. Good times.