Like so other many large issues that seem inevitable and insurmountable, the answer lies with you. I know it's completely corny, but...

How long does it take you to finish a painting? There are a lot of factors at play in determining how long a painting takes including:

Smooth or Groove? The portrait on the left is painted on on a brush-textured surface, and the one on the right is on a smooth panel.

What do I do with paintings that aren't good enough?One of the blessings of being prolific is that you can be ruthless with culling.

You've been painting with WHAT ??? This 8x10 painting of a scene of from my backyard is 95% finger-painted! In a "Let's shake things up!

I confess. I played with the thing where you put input descriptive words and generate an A.I. image. You know what? It was actually...