our custom sized retrofitted security doors averaged about $1000 each including installation to suit single hinged doors and about $500 included with a standard sized sliding glass door...ours were custom made by a local supplier to the same standard as the named brands..they're key locked and we're very happy with being able to leave the solid doors open overnight and when absent and they look so much better than any other security doors BUT for less obvious doors (laundry, internal door to garage etc) we've discovered an alternative very modest price door that we're also very happy with (bit fiddly to install but black or white Bastion for $169 from Bunnings)

I don't think it possible for any of these to look good. Crimsafe mesh in my opinion ruins any view that you may have. We have chosen not to have any, and enjoy our views and breezes. In 30 years we have been broken into twice, and in bothcase a rock through the fixed glass, so the security screens were of no use.

I have Crimsafe on my front door, cost me about $1000 installed.

having just spent the day with a crowd of children, grandchildren and dogs in and out i was reminded of the other great advantage of our security doors is that the netting can be pushed and scratched and leaned on without causing any damage (to the door or the child or pet) and are also heavy enough for the door closer to pull them shut quickly (quietly) and securely to exclude bugs without obstructing the breeze or obscuring the view...security from burglars was way down on the list after these other advantages

We got SP Screens to install SecureView 316 Security Screens throughout our house and they were excellent. Here is a page to help you work out how much security screens should cost: https://www.spscreens.com.au/blog/how-much-do-security-doors-cost/

Old post. Perhaps start your own with specific question