Man @Jackson I think your best hope if no ugly weather with winds comes is that clear drop cloth plastic. It doesn't last like regular greenhouse polyfilm but can keep things off till done if lucky. Not sure what heat you could use but maybe an extension cord. 12' is a big order but a pvc tube arrangement long enough with crossed members to make a dome might fit. Never hurts to have greenhouse polyfilm. Could even use it for an earlier start so this problem won't be messing with you next years end.
Plants develop what they have. Making a partial harvest would give more juice to what's left quickening those buds I'd think. Thinking if weather doom and gloom is worrying you a partial harvest might keep you busy thinking it helps and not be worried as much Something like that