It all depends on you
Hi,
I'm an new 100 Hour PPL, with no taildragger experience. How many hours of taildragger experience woud you consider neccessary to be safe in an Rocket?
That depends entirely on you. In my experience it takes about eight to ten hours just to solo the average nose wheel pilot in a Cub. I haven't flown a Rocket but it probably requires a bunch more skill and judgment than a Cub to operate safely.
I think judgment is more important than skill. A pilot with only moderate skill but possesing the key components of good judgment, self knowledge and humility, is much safer than the converse. How do you acquire judgment? With experience. With only 100 hours you lack experience but you can get it. The skill will come with good instruction and practice.
If you are mature, conservative, willing to take your time, willing to pay for high quality instruction and LISTEN to and FOLLOW what you are taught, and if you have a mentor to keep an eye on you after you solo, then you might get by with as little as 25 hours IN TYPE, if you are a quick study. At that point you will have a license to learn and you can probably stay out of trouble. That is my best guess without knowing you, but based on many years of teaching experience. If you are cocky and impulsive like some people I have known that bought more airplane than they could handle then you could end up just like them, becoming one with your airplane, if you know what I mean.
Personally, I find it still takes me about 100 hours before I am fully proficient in a new airplane type. Why not buy a Super Cub or Citabria and fly it for 100 hours or so before you tackle this high performance machine? What is the rush? Not for nothing is it called a Rocket.
I would expect a Rocket to handle a 2300 foot grass strip without difficulty. But can you? It will take some serious time in type before you can do that safely on a routine basis. Good luck.