In need of cat enrichment ideas

I think my cat is bored. He paws at the walls and meows loudly often. His food and water bowl are full and litter is clean. Taking today for example I played with him was a wand toy for 30 minutes early and probably pet him for about 20. I have multiple areas set up for his enrichment. I filled the bathtub and put bottle caps with treats in them to float in there and the little fish that swim around on their own. I also have some boxes set up with plastic bags and tissue paper crinkled with treats and catnip in them for him to rummage through. Nothing is getting his interest he's still in the other room meowing loudly. He likes cat tv but gets bored quickly and is picky. Anything that makes noise will scare him and he isn’t treat motivated. At some point I have to get work done- any advice on cat enrichment. Do you think I'm right that he's just bored? I'm tight on money right now so any cheap ideas are appreciated but I would be willing to spend a little money if it would make a big difference for him.