I just bought my A150K last August. I got back into flying after about a 15 year absence. This is my first airplane and it has been a learning experience so far, but not that bad (mostly positive!). A few items came up during the annual in Dec. that I wasn't expecting such as having to replace the spinner bulkhead (the plastic and metal part).
Best advice I can give you so far is to find a good mechanic that can do a pre-buy inspection and let you work with him so you can learn more about the airplane.
Best part about owning my own airplane is that I can fly it when ever my schedule and weather allow me to. No waiting for a rental airplane to get out of maintenance, etc.
I think a 150 is a good plane to learn airplane ownership on too, since the parts are not as expensive as a larger airplane.
Where in SC are you located? I'm in Camden, SC KCDN.