You can do it with one processor that way also. I personally don't do the cover art on the iPad app with prodigy not to say you couldn't. I'm just not the guy to answer that. The crestron app is okay but has its limitations. The Command Fusion set up is by far the best in my opinion but it puts you in a different price point so I usually just have cover art on the ptl4s. You can do a good bit with a single prodigy processor and you can extend your irs and serials with the global cache piece . They have a user module for it on the global cache website. With the old pmc2+ you can have two apple apps running at the same time, with the new three series it's six. I would still make sure that they have at least on handheld like the ptx3. You also need to keep in mind once you get to a certian point using prodigy it starts to make better sense to move to a cp2e.