Is it possible to use half-and-half to make whipped cream?

Yes. But you have to make sure your beaters and bowl are very freezer-cold. And that the half-and half is very refrigerator cold. It will take longer to whip than heavy cream. If you plan to beat it by hand, your arm will fall off. :-)

I don't think it will work or you'd have to whip for an extremely long time and have a lot of run off.

I have tried it. It's not quite the same texture. It was a little runny as if it was whipped cream sitting out at room temperature for a while. You may have better luck than I did.