When friends try to pitch me on their million-dollar ideas, I feel that I have a much better ability to estimate the size and scope. So instead of starting cons

When friends try to pitch me on their million-dollar ideas, I feel that I have a much better ability to estimate the size and scope. So instead of starting construction, I'm more likely to say something like '3 full-time devs working 6 months for a solid prototype, another 6 months for something that could be released' -- who's paying for all of this?