I know the simple answer is to cut the slats separately and making an assembly, I've done that before. This time I want to cut it from a single piece of 3/4 plywood. It will be approx. 3.5ft x 4ft when collapsed and approx. 6ft x 4ft extended with fingers/grooves about 1" in width... I want the slats skinny as it will also serve as a table.

I don't think a jig saw is the right tool; certainly not freehand.

I've considered making one side (forstner bits/table saw) and using that as a router template... but that seems like it would have to be very exact and a lot of wood waste.

I've also considered buying/using a dado blade set, but getting the step/spacing right seems problematic to me.

Or possibly contracting it out to have laser cut... not sure if that would be cost effective, or even possible at that thickness.

Anyone experienced with cutting something like this?