Since steel is so powerful, a steel door is the safest possible option for a door.
Storm doors shield your entrance door in the weather, usually with the extra safety of a deadbolt lock.
To provide you with a rough guide, Crimsafe installation pro Davcon Security Screens quotes that Crimsafe windows can set you back upwards of $450, Crimsafe doors might cost from $1,000, and Crimsafe patio enclosures might include a price tag upwards of $7,000 (however this will be based on your terrace's dimensions and shape).