I dig the Kodiaq. That would make a cool squad.
As for your car... Well for starters, not many consistently hit that 50mpg mark without being a hybrid, which means more expensive. But a comparable car would be the Golf of course, being same parent company and all. A VW Golf with similar options would be around $19,000-20,000 USD, but they only have an estimate of 35mpg.
Just some averages of cars in similar size/options I saw quick from my dealership group and nearby dealers (mpg's are EPA highway estimate):
-Toyota Yaris: 38mpg, $17,000
-Ford Fiesta: Unreliable, 40 mpg = $16,000
-Chevy Sonic: $18,000
-Honda Fit: $18,000 (38 mpg)
-Mitsubishi Mirage: $15,000 (41mpg) (Ugly, look and feel cheap, actually drove one of these once)
Your Fabia looks better than all of these too, in my opinion. It must be some kind of EPA/emissions garbage preventing those from being sold here, because especially after doing this, I think it would do well here. But what do I know, I daily drive a land yacht.