Yeah I think I would also start with a swing set, and then eventually get a trampoline later (if that is within the future budget plan haha) because swing sets are more little kid oriented and he'll definitely love it right now, and the trampoline is loved by all ages so it doesn't matter if you get it later.

I know as I got older swing sets were less appealing, but trampolines were always awesome, even moreso. Shoot, I just jumped on a trampoline a couple weeks ago and it was awesome.
