I know a joiner made one of these for himself, to test out his vacuum kit. Made the ends that way and connected to flat panels, which he then biscuit to the sides, sanded, filled all the joins in 2 pack and then discovered spraying the finish to be rather difficult to get it into the inside.
But as you say it is a simple design, and made from segmented sections it wouldn't cost much to make. Only think about the finish as you'd probably want to use filler to hide the joins, only once complete it would be difficult to spray finish, the gun won't fit inside.
You could make it as 2 components rather than 4 (Glued up end segments being a single component)
2 deep U shapes, so only a single join in the middle, cut from sheets of ply(possibly use a template to get as many shapes out a single board as poss', but again you'd need a strong joint and a way of finishing the inside to hide the join.
It would be easier to spray/finish open ended U shapes, then join them
Unless you make the join a feature with an opposing direction strip, possibly even metal.