Hmm, forgot the plants - any which are drought tolerant and/or adapted to warmer winters would do. Look for grey-green foliage as well as a hint. However, there are many others to choose from in the Aust native range or those that originate from other countries such as Sth Africa, Italy, and California, Mexico etc... where there is a similar climate.
The climate in Marginup is much the same as the rest of Perth - we are spread out, but no that much to be too different. It is inland so no sea spray and not too much in the way of cooling breeze - although that is not climate exactly. The general climatic zone is warm temperate which is similar to Mediterranean conditions.