Plenty. You have a large 500 ft margin, I think
Regardless of the published safety margin above terrain, just remember that at night where you may not be able to accurately see the terrain below you, it would be most unwise to deliberately descent below the MDA until you are established on final approach within the 15 degree approach splay. The reason for this is the critical obstruction that determines the MDA is not necessarily displayed on the instrument approach chart. It could be anywhere- even on early base leg.