Well, not to rain on your parade but that skimmer in my opinion isn't worth saving. Those types are usually very inefficient anyways.
It looks like you have plenty of room in the far right compartment since the return pump is external so you could fit most any skimmer you like in there.
What are you planning on keeping? Corals at all? If you are starting with fish only you can pass on the skimmer for a bit in my opinion. But I would for sure consider one since you clearly have the room and it can do nothing but help your tank.