Re-homing cockapoo Lab mix puppy

Cockapoo Labrador mix born May 15 2025. His name is Milo and he has his first round of shots plus micro chip. I got him July 20 but have to make a difficult decision of re-homing him because I live alone and work during the day and he stays by himself. One of my neighbors say he barks a lot through the day when I'm away. He's very playfully, has lots of energy, and responds to "sit" and "no". He doesn't shed and right now he's about 15 inches tall and 20 inches in length but I was told he will grow to be medium size. He is trained to use his poop tray that he will come with. Re-homing him for $400. Any additional questions feel free to ask.