Most places I've worked, despite similar security needs, have met them in a much less... performative way.

After all, the security gate is the first impression visitors get of your industrial facility, or office, or embassy, or whatever. You want it to look welcoming and secure at the same time. Projecting strength but not fearfulness.

If you must use the cheap fencing, conceal it with some plants. Where the fence is visible, go for some nice decorative metalwork. Move the turnstiles into a lobby and put a reception desk and some couches next to them. Add some meeting rooms (and toilets and coffee facilities) at the security boundary, so job interviews and meetings with suppliers don't give them unfettered access.