I think you'll find the answer to this question if you ask yourself the following: What's the amount of work required in order to get my business off the ground

I think you'll find the answer to this question if you ask yourself the following: What's the amount of work required in order to get my business off the ground? You're the only one who knows the answer to this question since you're the only person who has a clear idea of your 2 side projects in details. So to give you a more detailed answer, I'd say: 1. figure out the amount of work required in order to realize your projects. 2. Set a deadline and small goals in order to get where you want to be. 3. Only then, will you know the number of hours you need to work on your projects. Hope it helps.