I have a Big Buddy. I haven't tried it at -0 but it fires right up at 15 or so. I use it in an old camp trailer and it's hooked to the bulk tank. If I've had the tank disconnected, it can take a while for the propane to get through the line so it might take a lot of clicks then.

“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.