Peter
I tiled similar area in my kitchen along with utility room and loo when we had extension done
Ok Ive done a bit of tiling before – kitchen floor, bathroom walls and floor and the new bathroom walls in extension
Took me 3/4 day to do tiling, but that included lots of cuts around doors etc in the utility room, downstairs loo
Kitchen only was straight forward, minimal cutting of tiles took only about 3-4 hours
Im by no means an expert but I would like to think Im reasonably competent, it was also a perfectly flat clean new floor and a simple rectangle shape that happened to be almost a perfect multiple of 30cm
Grouting then took me another couple of hours, but I left that over a year between tiling and grouting (it was a long bike ride in between!)
So all in all I would say its a full days work but needs to be spread between a couple of days just because of tiling and grouting
Maybe if you dont fancy risking messing it up, buying a decent tile cutter etc you could get someone in to tile, then do the grouting yourself
may also be cheaper if you provide materials, although our plumbers when we did extension let us use their trade discount at the tile place and it was about 40%, so a tiler may be able to get the tiles cheaper for you