I've been Chippying for a few decades now and I love that aeroplane. But cheap to run they ain't. Our's has always been a big group which keeps the costs down, and not being a tourer a big group works well with availability, too.
However, for aerobatic bangs per buck, a Yak 52 share would be better. Or for a cheaper alternative to the Chippy, still with 2 seats but without the vintage charm and character, the T67 is OK.