If you are still only training why don't you complete that first, do a season in an inexpensive aircraft to increase your skill and confidence and trade up later.
At the moment you are concentrating on the flying. Ownership is a whole new ball-game and you have no idea as to how the group will work out. I think most people would advise being a member of a pre-existing group first to see the pitfalls and to reduce risk
Buying a pricey bit of kit too early could well end in tears