I'm Using My House Deposit To Start A Business Instead

Since my wife and I found out we’re having a baby (8.5 months ago), we’ve been saving like crazy. I’ve been putting in close to 60 hours a week in construction, and we’ve managed to save a decent amount—originally intended for a home.

But now, we’ve decided to go all in on starting a business to create the freedom and flexibility we want for our growing family. The plan is to use the money to support ourselves while also testing out business ideas.

So, here’s my question: Do you have a formula or method to test business ideas with minimal risk? Something that helps you spot early "signs of life" or demand before going all in?