Yeah a hefeweizen yeast is not really what you want for that style. I don’t think you’ll have any problems with the funktown. Might come out with some atypical yeast flavor but more citrus fruit than banana/clove. That blend doesn’t sour so you’ll have to source lactobacillus elsewhere if it’s not included in that kit.
I don’t really think the beer will come out sour at all, maybe a little tart from the hefe yeast but not sour. How is the kit pre soured? I’m thinking you’re either going to get a fruity ale beer from the funk town. Orma typical hefe if you use the m20. Again. Not really sour. Just more tart if anything.