How often should he poop?

[Traceur]

They poop when the need to poop. There's no "schedule".
They will often hold poop with a shed upcoming. So if you're expecting a shed, expect a poop with it.

If your snake goes weeks and multiple feedings (of appropriately sized prey) without pooping, you may notice the build-up towards the tail, often referred to as "sausage butt". Until you see that, don't worry at all. If you see that, still don't worry, we'll help you out.

Sweet, thanks, Craig! It's reassuring to know I actually have somewhere to go to ask specific questions if needed. This morning, he actually did poop. Quite a lot too. So that happened XD

Also, his past three meals have been with just one hopper. Think it'll be okay to start offering him two tomorrow?