All correct. except you will not be passing 30A through the resistor for very long. The current will very quickly come to zero. looking at my EVC402, there seams to be 0.012F of capacitance. see if you can use this equation to shed some insight on your situation. http://hyperphysics.phy-astr.gsu.edu/hbase/electric/imgele/capchg.gif
If however there was a short, or if the precharge was still engaged when the motor is driven, the resistor would receive 3KW of power and melt the resistor, it might be a good idea to use a slow blow fuse in the pre-charge circuit.
after you find how long it takes to charge your capacitors with your 4ohm resistor, you might want to choose say a 10ohm resistor because you don't need the precharge to complete in a few micro seconds.