From where I stand, it looks like you have your numbers backward.  The reason you start a startup is so that you can work those 15-20 hour weeks (or less) without anybody giving you grief about it.<p>Shipping software works just fine on a few hours a weeks.  Maybe a quick burst up front to get v1 out the door, but then you can ramp it down as far as you want to go.  I&#x27;ve gone entire months without opening the IDE for some of my paying products.<p>The problem with client work is that as soon as you stop working, the client stops sending you money.  SaaS doesn&#x27;t work that way.  Take advantage of that!