Great advice!

also will give illusion of a bigger bathroom if you use bigger tiles ..I used small ones on one wall as feature wall and larger ones on other walls ..

I work in tiles and a trick you can use is to lay the tile horizontally on the 'narrow wall'. This gives an optical illusion that the room is wider. These tiles at around $50 each can certainly add up so a wise use would be to use as high impact. In the ensuite use them behind the bath for the whole wall. Use white wall tiles for the rest of the walls. If you want to add more colour, tile the spa box in an colour tile that exactly matches the blue or grey from the pattern tile, use a matching grey tile on the floor instead of white. Or use the pattern tile behind the spar, make the rest of the room white and add a matching grey vanity. It's a lovely tile but may become a bit gaudy if you have a bit here there and every where. Again with the main you will probably not get an exact match with the outer room timber floor and it could look like you tried to match it and couldn't better to go for a complete contrast. Use the same tricks as the spa bathroom and don't forget matching blue towels for a bit o colour. Hope this helps.

Thank you @Creative Style Interior Design and @bigreader @Creativelychallenged - Thank you for your nice words. We are indeed very happy with the result. We also went through all these stages you describe, so don't feel depressed... there might be light at the end of the tunnel. Our research stage was so long and quite discouraging at times. We've always wanted to live in a queenslander, but our house is not one. This didn't stop us on going ahead adding some character to our bathrooms design (and kitchen). We started with the idea of making these bathrooms with a colonial touch but we found that it was not easy to find the elements we wanted (tiles, furniture, tapware) at a cost that would fit our budget. We learned that the type of tiles we liked (encaustic) were VERY expensive ($200+), traditional looking furniture was also very expensive... So we shifted to a more modern design...(not very happily though), and after a while of collecting ideas for modern tiles, furniture etc.. we felt quite depressed because we were compromising... updating our bathrooms with something fresher, but far, far away from what we really liked. In our view modern furniture looked very plain, streamlined and... boring, but we were doing 2 bathrooms (on a budget) so we were not prepared to spend a fortune, and we settled with modern. We ordered marble type tiles for the floor 900x600, and wood like tiles for the walls, and booked the builder to start demolition. Luckily for us National tiles called us saying that there was an error and the tiles they promised were not going to be available for 3 more months!!! Depressed again.... It took us so long to find something we liked (kinda) and now we were back to square one. Then my lovely wife said... Why don't we give it another go and try to make a more traditional design as we originally wanted.... So to make it short... we went back online with 'refreshed' energy and pressure (demolition already started) and found many things I coudn't find before: Floor tiles @ $25/m2 Subway tiles for walls @$16 the box on sale... Ensuite furniture and basin from Ikea Main bathroom furniture was an antique dresser we found in an op shop for $150 repainted and repurposed.... etc... In the end we spent approx $12,5K for both bathrooms in total :-) So, to summarise... don't dispair... just look in this website, on pinterest, magazines, google, etc... Play around with ideas and copy!... (you'll see that our ensuite is quite similar to the first photo in this discussion)... Good luck! :-)