Where are you? There are some good alternatives in London. Emerie et Cie are beautiful, although I find the site difficult to navigate. Or there is this place in Camden, which came out as significantly cheaper than Fired Earth when we were looking. They have designs in stock and bespoke designs so you can choose the colours.
That sounds about right for encaustic tiles, sorry. You can get digitally printed tiles which are cheaper, but not nearly as beautiful. Or you could see if you could find reclaimed tiles in a yard, but quality would be variable and it might be difficult to find 20m2...
We are in the process of buying a 1930s house (fingers crossed). We would like a beautifully tiled hallway and have seen these tiles (Romanesque at the bottom with the dog in the photo) but just had a quote of £4k for a space of 8 x 2.5 metres (just for the tiles, fitting would be on top)
If anyone knows of anything similar but cheaper please post here.