Place in Oregon sells wasabi all kinds of stuff. I am going to get my set-up ready before I spend a bunch of money, then I will do some experimental plantings. As they say there's more than one way to skin a cat.
You will probably be successfull at growing wasabi.
Without running water,the rizomes will be smaller but i think that is a good thing in case you only want a little fresh wasabi for a day.
Same like my horseradish its small but i like that so that i dont dig a giant root,then eat only half of it and then the rest i throw it away because it looses power.
Horse raddish is also verry expensive just like wasabi if you calcuulate it by kilograms/ pounds etc.
I pay 2 euros for like 50 grams of horseradish at peasants market= 20 euros a pound/40 euro a kilogram.
I like to eat a few roots of horseradish at once when i make boiled pork foots( a recipe thats not for everybody
).