Y'all are missing the truly horrible part of my idea (though Hansel & Gretel is about the right idea). After the house is built, the customers are intended to eat the house itself. I didn't flesh out the whole idea in my comment, but they should be inside the house while eating it. If it's big enough to warrant the name "house" (not "shack" nor "misshapen pile") then it's big enough for its inevitable collapse to endanger the customers.

Responding further upthread: this is an illustration of a "time waster." They exist on both sides (investors / founders, salespeople / customers, etc) and recognizing them is an important skill. Time is your most valuable resource. Use it wisely.

What about if you just make & sell Italian food?

See, there are no bad companies, all companies can pivot. In fact the original idea doesn't matter at all. Hurr durr buy my startup book