Ron, that depends on the pilot. Abilities run the gamut. Easily doable for some, not for others. Most Pitts S-1's are experimental, and there will be no "POH". I've got a factory S-1S, that contains some POH-like information, but takeoff and landing distances are not covered, and no POH deals with wet grass. This is something that your experience (once you start flying Pitts') will have to inform you on. I think there are a lot of little details you are concerned about that can only be addressed as you learn and gain experience. Your perspective will also shift, so don't be surprised if all the ideas you have right now about aircraft specifics and the type of aerobatics you want to do changes over time.
The best thing you can do right now is get as much tailwheel time as you can in anything you can get your hands on. When you are ready, just buy any solid S-1, get some Pitts training, and run as much gas through it as you can afford. You don't need 200+ HP or carbon fiber wings. I don't know of anybody who has ever built carbon fiber ribs and wing components for a Pitts. You're talking ground up re-engineering, which takes some high-level expertise and ability, not to mention $$$. If this was easy and cheap enough to correctly engineer/fabricate, and the performance gains were significant enough, it would have already been done. The top Pitts-like airshow acts involve custom-built wings by the best in the business, and they're all wood. You'll need a good bit of Pitts-specific skill and experience before being able to decide what kind of mods (if any) are truly worth it for you. Relax and enjoy the ride. It's not a destination, and you've just barely started. Good luck.