Do you have a buddy with a pickup truck-maybe someone who owns a generator? Haul a generator there and use an angle grinder.
You can get an angle grinder from Harbor Freight for $25 or less.
A Battery powered angle grinder will work ok-take maybe 5 minutes instead of the 2 minutes the woman in the video took.
A Dremel tool will take a long time and several tiny cut off wheels.
A hacksaw will take a long time- maybe 1/2 hour-.It will be tough to get it to initially "bite into" that tough steel.It will want to slide from side to side.