Posted: 20/03/2015 at 20:50
Using lots of evergreen plants will give the effect - lots of different Bamboo's, hardy Palm trees, Fatsia japonica, Aucuba japonica, Mahonia japonica, Kerria, Skimmia, Phormiums, Miscanthus etc.
Would you should do is go to http://www.houzz.co.uk/photos/garden - then look up tropical style gardens and the site allows you to create a scrapbok of photos. You can then show that to a reasonable landscaper to create. That will save some time. It will not be cheap as you are buying a lot of plants, hard landscaping, raised beds and man hours etc.