I could be wrong: I think the dry winter and spring would be the lid on having perennials from most Narcissus, tulips and hyacinths - unless they were prepared to water. And the jump to 'hot and dry' for spring definitely shortens flowering time and quality.

However: if you were to look for SouthAfrican bulbs from their summer-wet/winter-dry zones you'd probably get the perennial effect you were after, though not in spring.

Likely would be an insufficent chill period as well. Bulbs would have to be dug and refrigerated each year in order to achieve a proper dormant chill level. Some narcissus can do without but most other spring flowering "Dutch" bulbs will not.

The customs will confiscate the bulbs if they catch you as it's strictly forbidden to introduce flowers, bulbs, seeds or vegetables. I probably live in the same zone and I've been growing daffodils successfully for years. They are the only bulbs that grow well. Surprisingly they withstand several months of heavy rain in the summer and you don't need to lift them if you have good drainage.Hiacynths need refrigeration for 2 to 3 months before planting, the other bulbs don't thrive although tulips will grow well the first season if you manage to smuggle them through customs. But you have to sign a form where you swear you don't carry plant material so it can be unpleasant if they catch you