When you talk "pilsner" the term "quick turnaround" is a bit out of context.
I gather you want to brew this experimental "lager" using ale yeast, which may turn out to be a great version of steam beer when all is done. And yes, I too love experimenting and running things (way) outside the box. I am very curious to know how it turns out. Just don't expect to find a "pilsner" in the end.
Say, brewing a Pilsner is a yard long.
Ingredients, water, and fermentation are each 1 foot.
Paying a lot of attention to correct pH and water composition, but ignoring the fermentation methods (yeast, temperature, lagering time) only gets you a 2-foot pilsner.