I think dehydration is only an issue with sweet vegetables like carrots, because all that would be left is sugar. Cucumbers are mostly water. If you dehydrate them, there's hardly anything left. Dried apricots are just little sugar bombs (delicious little sugar bombs).
Also, have you looked up the points in tortilla chips? It's something like 4 points for 14 chips. You can also make your own with low carb tortillas. If you're really missing nachos, I don't think dehydrated cucumbers are going to cut it.
Also, I totally get you. I
tacos. So I eat tacos.