I have a Turbulent. Direct costs are about £1600 a year - hangarage is the main one at about 1100; then you have LAA membership, inspection and insurance. It's a nice aircraft with a reasonable range and luggage capacity - would have loved to do a bit of camping this warm summer, but reliability issues have kept me grounded.
Now if you buy a completely sorted aircraft with no snags that is all you need to know. My experience is that it has been a learning curve and I spend a fair bit of time and money keeping it running. I have a lathe which I've needed to make all sorts of parts - e.g. the ball on the throttle came off in my hand. I think you need a degree of mechanical nous and willingness to get your hands dirty to run these aircraft. If you have to pay other people to do this, they stop being so cheap.