Working on this suite of apps might be his day job. If he takes up a day job he might not be able to work on and maintain these many apps. Can you develop and

Working on this suite of apps might be his day job. If he takes up a day job he might not be able to work on and maintain these many apps. Can you develop and maintain a suite of 8-10 apps only on your free time? I was talking about how this specific developer who makes these many apps can make money, and not how you do.