[spacemanspif]

Brake booster holds vacuum for a few pumps before the pedal gets hard and the system essentially goes into old school manual brake mode. Test out how much you get buy shutting the car off in your driveway and pumping the pedal and that will give you an idea of how much braking you can do with the engine off before you lose power assist. If the Hyundai shuts off the injectors when you are not on the gas, coasting in gear down the hill is just as efficient since no gas is being burned in either situation. Using DFCO is better than EOC in your case since it will help to keep you slow and not gain excessive speed. If you have an MPG gauge it should read 99999 when the engine activates DFCO and stops using fuel. The best compromise between safety and MPG would probably be to DFCO the first 2/3 of the hill and then near the bottom throw the trans in neutral and EOC the last bit, allowing yourself to increase speed some to extend your coast a little farther before you bump start and carry on with your commute.