Driving home my brake light and ABS light came on. Brakes felt fine at moments but then spongy. I pull into the driveway and park it, get out and see brake fluid dripping out the rear. Somewhere between the tank and the rail I have a busted brake line. 
I'm guessing the easiest way to fix this would be to drop the tank, which is full.
Any input.

I'm guessing the easiest way to fix this would be to drop the tank, which is full.

Any input.