Music assistant on home assistant or without HA will let you host your own music but also allow for the addition of streaming providers. It lets you cast your collection to pretty much any speakers. You can even build your own cast receivers with any android device and squeeze cast.
Maybe but it looks like the highest point of the pumpkin flesh is higher than the lowest point of the stem so it wouldn’t look as good. This way is much less waste and faster because you can print all the stems at once.