Why are people (foreigners) so hell bent on changing things here? Taiwan has its own style, flavor and feel. Stop trying to change it to be "just like home". Go back home if you liked it so much more.
Everybody has different opinions on how things should taste or be done, deal with it. As far as the OP goes...I say, give your noodle stand a try. Do it the way you want to if that is what will make you happy. If it works, good for you! If it fails, then you know what the "market" wants and you can adjust your recipe / technique to what will sell. Be respectful and considerate of your wife. She listened to you about your technique and she seems more comfortable doing it her way. Let her try it her way. If it is you doing the cooking, you can do it your way.
I have cooked many different western dishes that, to me and a few friends, were fantastic. However, a few of the Taiwanese that tried it didn't care for it. To them the flavor of many western foods is too strong. I know if my parents came here to visit, they would hate the local food. Some people just have their comfort zones and don't like venturing out of them. To make your business financially successful, you will need to know your market. And cooking traditional western food that hasn't been altered to meet Taiwanese tastes, may not work too well in a night market.
In any case, best of luck to you.