If the font note says, "For personal use", can I use this for a decal on a machine we manufacture? Or can we purchase this font so that we can use it as we wish? The font I would like is
SF SPORTS NIGHT.

Inside the download .zip file is a text document named "Read me". Read the Read Me, and you'll be able to answer your own question.

why this picture ?
are you trying to sell us some monsanto seeds or some pop-corn ?

Shyfonts is down, brothel.

If you manufacture this machine for you-self, it's a personal use.
If this machine is for sale, it's not a personal use.

I understand the personal use vs the commercial use.
My real question now is, can we buy the font? If not, then
I need to move on to find a font similar. Thanks.

By the way, no reason for the farm scene.

just wasting bandwidth, thank you