It's manageable if you have a business partner so you two could alternate in running things and you'll have to slack off at work to release energy for the side

It's manageable if you have a business partner so you two could alternate in running things and you'll have to slack off at work to release energy for the side gig. Also, beware that your employer might try to get a piece of your side profits: there are ways to dodge this, but you'd better have a sound defense plan.