This was in the paper today: a retrospective of paintings by Canadian artist Levine Flexhaug. Hundreds of variations on a theme. http://levineflexhaug.ca/ I suspect that seeing all those paintings, in all those colors, in one place, at one time would be remarkable.
They would be dismissed as factory paintings, they're sole redeeming feature that they are all by one person... so it's a style. Rather like Robert Cox in the U.S., or Bob Ross, or Bill Alexander. I'd buy one. I love kitsch.
Oh, those "Happy Trees" I looked up Levine's paintings - the ones that are available for sale are 400 to 600$ for the smaller ones. But they are pretty!
A whole wall full would be cool. Individually factory painting is being kind, but collected together they're striking.