The Lean Startup advocates proportional investment in solutions. WHEN the problem comes up (again, after deciding to do this) determine how much your time percentage wise this took out of your week or month. Invest that amount to fix it, right now. My interpretation would be, spend that time trying to solve part of it. Every time that problem comes up keep investing in that thing, that way if you've made the wrong call you only waste a small portion of your time. But you also are taking steps to mitigate it if becomes more of an issue in the future.